Sealing flange, quantum measurement and control circuit based on flexible strip line and quantum computer

Abstract

The utility model discloses a sealing flange, a quantum measurement and control circuit based on flexible strip lines and a quantum computer. The sealing flange comprises a first end face fixed to a room temperature disc of a dilution refrigerator in a sealed mode, a second face used for fixing the multiple flexible strip lines in a sealed mode, and a hollow shell used for communicating the first end face with the second face in a sealed mode. Wherein the first end face is provided with a first through hole through which a plurality of flexible strip lines pass; the second surface is provided with a plurality of second through holes, each second through hole is used for one flexible strip line to pass through, and a sealing glue layer is arranged at a gap between the flexible strip line and the second through hole; the area of the first end face is smaller than that of the second face. According to the sealing flange, the flexible strip line is installed on the room temperature disc in a sealed mode so as to guarantee the air tightness of a refrigerating machine, and the installation space on the room temperature disc is saved.

Description

Technical Field

[0001] The utility model relates to the technical field of quantum computers, in particular to a sealing flange, a quantum measurement and control circuit based on flexible strip lines, and a quantum computer. Background Art

[0002] Quantum computing is a new computing model that uses the laws of quantum mechanics to control basic information units for calculations. While the basic information unit of classical computing is the classical bit, the basic information unit of quantum computing is the qubit. A classical bit can only exist in one state, either 0 or 1, but based on the quantum mechanical principle of superposition, a qubit can exist in a superposition of multiple possible states. As a result, quantum computing far outperforms classical computing in terms of computational efficiency.

[0003] In superconducting quantum computers, quantum chips must operate at extremely low temperatures, such as around 10 millikelvin (mK). This low temperature is typically maintained by a dilution refrigerator (also known as a refrigerator), with the quantum chip mounted on the lowest temperature floor of the refrigerator. To control and measure the quantum chip at this bottom layer, a circuit carrying quantum measurement and control signals must enter the dilution refrigerator, passing through the refrigerator's various cold plates and connecting to the quantum chip at the bottom temperature zone.

[0004] With the rapid growth in the number of qubits, the required measurement and control signal transmission lines (also known as quantum measurement and control circuits) have also increased, but the space inside the dilution refrigerator is generally limited. Currently, the signal transmission lines in the measurement and control signal transmission lines are generally coaxial cables. However, coaxial cables have the following disadvantages: their size will be difficult to achieve a larger-scale miniaturization design in the long term, they are very space-consuming to install, and they have low adaptability to the refrigerator through-holes. With the development of flexible stripline, due to its high integration and flexibility, it is inevitable that flexible stripline will replace coaxial cable as the cross-temperature link of quantum computers. When using flexible stripline, in order to ensure the airtightness of the refrigerator, a flange is required to seal the flexible stripline to the room temperature plate.

[0005] It should be noted that the information disclosed in the background technology section of this application is only intended to deepen the understanding of the general background technology of this application, and should not be regarded as an admission or any form of implication that the information constitutes prior art already known to those skilled in the art. Utility Model Content

[0006] The purpose of the utility model is to provide a sealing flange, a quantum measurement and control circuit based on a flexible strip line, and a quantum computer, which are used to seal the flexible strip line on a room temperature disk to ensure the airtightness of the refrigerator.

[0007] In order to achieve the above purpose, the present invention provides the following technical solutions:

[0008] A first aspect of the present invention provides a sealing flange comprising a first end face sealingly fixed to a room temperature disk of a dilution refrigerator, a second face for sealingly fixing a plurality of flexible ribbon wires, and a hollow shell for sealingly connecting the first end face and the second face;

[0009] Wherein, the first end surface is provided with a first through hole for the plurality of flexible strip lines to pass through;

[0010] The second surface is provided with a plurality of second through holes, each second through hole is used for one of the flexible strip lines to pass through, and a sealing adhesive layer is provided in the gap between the flexible strip line and the second through hole;

[0011] The area of the first end surface is smaller than the area of the second surface.

[0012] The sealing flange as described above, further, a plurality of the second through holes are arranged in an array on the second surface;

[0013] And / or, the second surface includes a second end surface opposite to the first end surface and / or at least one side surface connected to the second end surface.

[0014] As for the sealing flange as described above, further, the hollow shell is trumpet-shaped, the end with a smaller opening is sealedly connected to the first end face, and the end with a larger opening is sealedly connected to the second face.

[0015] As described above, the sealing flange further comprises a hollow shell including a bellows and an outward expansion tube; one end of the bellows is sealedly connected to the first end face, the other end of the bellows is connected to the end with a smaller opening of the outward expansion tube, and the other end of the outward expansion tube with a larger opening is sealedly connected to the second face.

[0016] A second aspect of the present invention provides a quantum measurement and control circuit based on a flexible stripline, comprising a plurality of flexible striplines and the above-mentioned sealing flange;

[0017] One end of the flexible strip line is electrically connected to a signal source or a measuring device, and the other end is electrically connected to a quantum chip.

[0018] The quantum measurement and control circuit based on the flexible strip line as described above further includes a heat sink component provided on each cold plate of the dilution refrigerator.

[0019] The heat sink assembly includes a heat sink seat and a heat conducting sheet;

[0020] The heat sink seat includes a first clamp seat and a second clamp seat that are detachably connected, and the first clamp seat and the second clamp seat form a receiving hole when they are clamped together; the receiving hole is used to accommodate a wire group including a plurality of flexible strip lines, and the thermal conductive sheet is attached between any two adjacent flexible strip lines in the wire group, and the extension section of the thermal conductive sheet beyond the receiving hole is in contact with the wall surface of the clamping point of the first clamp seat and the second clamp seat; the heat sink seat is installed on the cold plate.

[0021] The quantum measurement and control circuit based on the flexible stripline as described above, further, each of the flexible striplines includes a first flexible stripline segment and a second flexible stripline segment disposed opposite to each other at first ends, and a fixing component;

[0022] The first flexible stripline segment and the second flexible stripline segment each include opposing first and second surfaces;

[0023] The first surface of the first end of the first flexible stripline segment exposes a first conductive layer; a first solder layer is provided on the first conductive layer; the first surface of the first end of the second flexible stripline segment exposes a second conductive layer; a second solder layer is provided on the second conductive layer;

[0024] The fixing assembly is used to detachably press the first flexible strip line segment and the second flexible strip line segment together to make the first solder layer and the second solder layer contact each other, and to conduct heat to the first solder layer and the second solder layer so that they melt together after being heated.

[0025] The quantum measurement and control circuit based on the flexible strip line as described above, further, the fixing component includes:

[0026] a first clamping block, configured to be attached to the second surface of the first flexible strip segment;

[0027] a second clamping block, configured to be attached to the second surface of the second flexible strip segment;

[0028] A fastener is used to achieve a detachable connection between the first clamping block and the second clamping block.

[0029] The quantum measurement and control circuit based on the flexible stripline as described above, further, has microwave elements integrated on the flexible stripline.

[0030] A third aspect of the present invention provides a quantum computer, comprising the above-mentioned quantum measurement and control circuit and a signal source device outside the dilution refrigerator and a quantum chip inside the dilution refrigerator connected by the quantum measurement and control circuit.

[0031] The beneficial effects of the present invention are:

[0032] The flexible strip line is installed on the room temperature disk through a sealing flange. In order to ensure airtightness, it is necessary to ensure the sealing between the sealing flange and the room temperature disk and the sealing between the flexible strip line and the sealing flange. In this application, the sealing flange is sealed and fixed on the room temperature disk through the first end face, and multiple flexible strip lines are sealed and installed through the second face, thereby ensuring airtightness; in addition, by separating the first end face for sealing and fixing to the room temperature disk and the second face for sealing multiple flexible strip lines, the sealing of multiple flexible strip lines is not achieved on the first end face. In this way, there is no need to set a sealing layer between the first through hole of the first end face and the multiple flexible strip lines, so that the area of the first end face can be smaller than the area of the second face, so that the sealing flange saves installation space on the room temperature disk while ensuring airtightness.

[0033] The quantum measurement and control circuit based on flexible strip lines and the quantum computer provided by the present invention include the above-mentioned sealing flange, and therefore have the same beneficial effects, which will not be described in detail here. BRIEF DESCRIPTION OF THE DRAWINGS

[0034] Figure 1 Schematic diagram of the structure of the sealing flange provided in the embodiment of the utility model Figure 1 ;

[0035] Figure 2 for Figure 1 Schematic diagram of the structure in which the second surface is sealed with a flexible ribbon line;

[0036] Figure 3 Schematic diagram of the structure of the sealing flange provided in the embodiment of the utility model Figure 2 ;

[0037] Figure 4 Schematic diagram of the structure of the sealing flange provided in the embodiment of the utility model Figure 3 ;

[0038] Figure 5 A schematic diagram of the structure of a quantum measurement and control circuit based on a flexible stripline provided in an embodiment of the present invention when in use;

[0039] Figure 6 A top view of the heat sink assembly provided in an embodiment of the present invention Figure 1 ;

[0040] Figure 7 The main view of the heat sink assembly provided by the embodiment of the utility model Figure 1 ;

[0041] Figure 8 A top view of the heat sink assembly provided in an embodiment of the present invention Figure 2 ;

[0042] Figure 9Left view of the heat sink assembly provided by the embodiment of the utility model Figure 1 ;

[0043] Figure 10 A side cross-sectional view of the flexible strip line provided by an embodiment of the present invention Figure 1 ;

[0044] Figure 11 A front cross-sectional view of the flexible strip line provided in an embodiment of the present invention Figure 1 ;

[0045] Figure 12 A side cross-sectional view of the flexible strip line provided by an embodiment of the present invention Figure 2 ;

[0046] In the accompanying drawings: 100, sealing flange; 101, first end face; 1011, first through hole; 102, second face; 1021, second through hole; 103, bellows; 104, expansion tube; 105, sealing adhesive layer; 200, flexible strip line; 300, room temperature plate; 400, cold plate; 500, signal source; 600, quantum chip;

[0047] 10. First flexible stripline segment; 11. First conductive layer; 12. First metal layer; 13. First solder layer; 14. First insulating layer; 20. Second flexible stripline segment; 21. Second conductive layer; 22. Second metal layer; 23. Second solder layer; 24. Second insulating layer; 30. Fixing assembly; 31. First clamp; 32. Second clamp; 33. Bolt; 34. Spring; 35. Nut; 40. Strip heater;

[0048] 50. Heat sink assembly; 51. First clamping seat; 511. First groove; 512. Thermal conductive column; 52. Second clamping seat; 521. Second groove; 522. First positioning hole; 53. Thermal conductive sheet. DETAILED DESCRIPTION

[0049] In order to enable those skilled in the art to better understand the technical solutions in this application, the technical solutions in the embodiments of this application will be clearly and completely described below in conjunction with the drawings in the embodiments of this application. Obviously, the described embodiments are only part of the embodiments of this application, not all of the embodiments. Based on the embodiments in this application, all other embodiments obtained by ordinary technicians in this field without making creative work should fall within the scope of protection of this application. The embodiments described below with reference to the drawings are exemplary and are only used to explain this application, and cannot be interpreted as limiting this application.

[0050] In the description of the present invention, it should be understood that the terms "center", "up", "down", "left", "right", etc., indicating directions or positional relationships, are based on the directions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore cannot be understood as a limitation on the present invention.

[0051] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the quantity of the technical features being referred to. Thus, a feature specified as "first" or "second" may explicitly or implicitly include one or more of such features. In the description of this utility model, "plurality" means at least two, such as two, three, etc., unless otherwise specifically defined.

[0052] Combine Figure 1 、 Figure 2 and Figure 5 , Figure 1 Schematic diagram of the structure of the sealing flange provided in the embodiment of the utility model Figure 1 , Figure 2 for Figure 1 Schematic diagram of the structure in which the second surface is sealed with a flexible ribbon line; Figure 5 A structural schematic diagram of the application of a quantum measurement and control circuit based on a flexible strip line provided in an embodiment of the present invention (disclosing the specific position of the sealing flange when applied); an embodiment of the present application discloses a sealing flange 100, comprising a first end face 101 sealed and fixed on a room temperature disk 300 of a dilution refrigerator, a second face 102 for sealing and fixing a plurality of flexible strip lines 200, and a hollow shell for sealingly connecting the first end face 101 and the second face 102; wherein, the first end face 101 is provided with a first through hole 1011 for the passage of the plurality of flexible strip lines 200; the second face 102 is provided with a plurality of second through holes 1021, each second through hole 1021 is provided for the passage of one of the flexible strip lines 200, and a sealing glue layer 105 is provided at the gap between the flexible strip line 200 and the second through hole 1021; the area of the first end face 101 is smaller than the area of the second face 102.

[0053] The flexible strip line 200 is installed on the room temperature disk 300 through the sealing flange 100. To ensure airtightness, it is necessary to ensure the sealing between the sealing flange 100 and the room temperature disk 300 and the sealing between the flexible strip line 200 and the sealing flange 100. In this embodiment, the sealing flange 100 is sealed and fixed on the room temperature disk 300 through the first end face 101, and multiple flexible strip lines 200 are sealed and installed through the second face 102, thereby ensuring airtightness; In addition, by sealing and fixing the sealing flange 100 to the room temperature disk 300, the sealing flange 100 of the embodiment is sealed and fixed to the room temperature disk 300. The first end face 101 of 00 and the second face 102 for sealing the multiple flexible strip lines 200 are separately provided, and the sealing of the multiple flexible strip lines 200 is not achieved on the first end face 101. In this way, there is no need to set a sealing adhesive layer 105 between the first through hole 1011 of the first end face 101 and the multiple flexible strip lines 200, so that the area of the first end face 101 can be smaller than the area of the second face 102, so that the sealing flange 100 saves installation space on the room temperature disk 300 while ensuring the airtight performance.

[0054] In some implementations of this embodiment, a plurality of the second through holes 1021 are arranged in an array on the second surface 102 . This arrangement not only facilitates the installation of the flexible strip line 200 , but also improves the integration of the sealing flange 100 .

[0055] In some implementations of this embodiment, the second surface 102 includes a second end surface opposite the first end surface 101 and / or at least one side surface connected to the second end surface, so that the second surface 102 expands upward and / or laterally, thereby saving installation space on the room temperature tray 300. In actual applications, the layout of the second surface 102 can be determined based on specific needs.

[0056] Several specific examples are given below.

[0057] Example 1: Figure 1 As shown: the second surface 102 is a second end surface opposite to the first end surface 101 .

[0058] Example 2: Figure 3 Schematic diagram of the structure of the sealing flange 100 provided in the embodiment of the present utility model Figure 2 ,like Figure 3 As shown: the second surface 102 is one or more side surfaces connected to the second end surface. Of course, in order to further improve the integration and installation convenience, Figure 3 On the basis of this, the second surface 102 may include, in addition to one or more side surfaces, an end surface opposite to the first end surface 101 .

[0059] In this embodiment, the structure of the hollow shell is not specifically limited. Figure 1As shown in some embodiments, the hollow housing is trumpet-shaped, with its smaller end sealed to the first end surface 101 and its larger end sealed to the second surface 102. By configuring the hollow housing in the trumpet shape, the sealing flange 100 expands upward and outward, reducing the installation space for the sealing flange 100 on the room temperature tray 300.

[0060] Figure 4 Schematic diagram of the structure of the sealing flange 100 provided in the embodiment of the present utility model Figure 3 ,like Figure 4 As shown in other embodiments, the hollow housing includes a bellows 103 and an outward expansion tube 104; one end of the bellows 103 is sealed with the first end surface 101, the other end of the bellows 103 is connected to the end with the smaller opening of the outward expansion tube 104, and the other end of the outward expansion tube 104 with the larger opening is sealed with the second surface 102. Because the hollow housing includes the bellows 103 and the outward expansion tube 104, the bellows 103 can adjust the outward expansion direction of the outward expansion tube 104 when installing the flexible ribbon cable 200. For easier installation, the outward expansion tube 104 allows the sealing flange 100 to expand outward, reducing the installation space required by the sealing flange 100 on the room temperature plate 300. Furthermore, the outward expansion tube 104 can be trumpet-shaped.

[0061] Based on the same application concept, Figure 5 A schematic diagram of the structure of a quantum measurement and control circuit based on a flexible stripline 200 provided in an embodiment of the present invention; Figure 5 As shown: The embodiment of the present application also proposes a quantum measurement and control circuit based on a flexible strip line 200, including multiple flexible strip lines 200 and the above-mentioned sealing flange 100; one end of the flexible strip line 200 is electrically connected to a signal source 500 or a measuring device, and the other end is electrically connected to a quantum chip 600.

[0062] The quantum measurement and control circuit based on the flexible strip line 200 of the present application includes the above-mentioned sealing flange 100, and therefore has the same beneficial effects as the above-mentioned sealing flange 100, which will not be repeated here.

[0063] Specifically, in this embodiment, one end of the flexible strip line 200 is electrically connected to the signal source 500 or the measuring device after being connected to the coaxial cable via a signal connector; the other end of the flexible strip line 200 is plugged into the packaging box of the quantum chip 600 via a signal connector to achieve electrical connection with the quantum chip 600.

[0064] Figure 6 A top view of the heat sink assembly 50 provided in an embodiment of the present invention Figure 1 ; Figure 7 The main view of the heat sink assembly 50 provided in the embodiment of the present invention Figure 1 ;like Figure 5 、 Figure 6 and Figure 7 As shown, in some implementations of this embodiment, the quantum measurement and control circuit based on the flexible strip line 200 further includes a heat sink assembly 50 arranged on each cold plate 400 of the dilution refrigerator, and the heat sink assembly 50 includes a heat sink seat and a heat conducting sheet 53.

[0065] Specifically, the heat sink seat includes a first clamp seat 51 and a second clamp seat 52 that are detachably connected, and the first clamp seat 51 and the second clamp seat 52 form a receiving hole when they are clamped together; the receiving hole is used to accommodate a wire group including a plurality of flexible strip lines 200, and the thermal conductive sheet 53 is attached between any two adjacent flexible strip lines 200 in the wire group, and the extension section of the thermal conductive sheet 53 beyond the receiving hole is in contact with the wall surface of the clamping point of the first clamp seat 51 and the second clamp seat 52; the heat sink seat is installed on the cold plate 400.

[0066] In the heat sink assembly 50 of this embodiment, a plurality of flexible strip lines 200 are clamped in the accommodating hole of the heat sink seat. Since a thermal conductive sheet 53 is attached between any two adjacent flexible strip lines 200 and the portion of the thermal conductive sheet 53 extending beyond the accommodating hole is in contact with the clamping portion of the first clamp seat 51 and the second clamp seat 52, the heat of the plurality of flexible strip lines 200 is efficiently conducted to the heat sink seat. Since the heat sink seat is installed on the cold plate 400, the heat is conducted to the cold plate 400, thereby achieving the effect of efficiently dissipating heat for the plurality of flexible strip lines 200.

[0067] In this embodiment, the number of flexible strip lines 200 in a line group is not specifically limited, but is no less than two. For example, a line group may include two, three, four, or another number of flexible strip lines 200. In this embodiment, the number of thermally conductive sheets 53 required in each line group is related to the number of flexible strip lines 200. For example, when there are two flexible strip lines 200 in a line group, one thermally conductive sheet 53 is required; when there are three flexible strip lines 200 in a line group, two thermally conductive sheets 53 are required.

[0068] In order to further improve the heat dissipation effect, in some implementations of this embodiment, the heat conducting sheet 53 is adhered to the surface of the flexible strip line 200 by using a heat conducting adhesive.

[0069] By adhering the heat conducting sheet 53 to the surface of the flexible strip line 200 through heat conducting adhesive, heat can be effectively conducted, so that the heat of the flexible strip line 200 is more effectively transferred to the heat conducting sheet 53, thereby improving the heat dissipation effect of the flexible strip line 200.

[0070] In order to further improve the heat dissipation effect, in some implementations of this embodiment, the extension section of the heat conductive sheet 53 extending beyond the accommodating hole is in complete contact with the wall surface of the clamping point of the first clamping seat 51 and the second clamping seat 52; since the extension section is in complete contact with the clamping wall surface, the contact area is increased, thereby improving the heat dissipation effect.

[0071] In order to further improve the heat dissipation effect, in some implementations of this embodiment, the heat conducting sheet 53 is completely laid on the portion of the flexible strip line 200 located in the receiving hole.

[0072] In order to further improve the heat dissipation effect, in some implementations of this embodiment, the thermal conductive sheet 53 extends along the width direction of the flexible strip line 200 toward the outside of the accommodating hole to form the extension section, and the extension section is clamped by the first clamp seat 51 and the second clamp seat 52 to achieve contact between the extension section and the wall surface of the clamping point of the first clamp seat 51 and the second clamp seat 52; this arrangement enables the first clamp seat 51 and the second clamp seat 52 to fully contact the thermal conductive sheet 53, thereby improving the heat dissipation effect.

[0073] Figure 8 A top view of the heat sink assembly 50 provided in an embodiment of the present invention Figure 2 ;like Figure 8 As shown, in Figure 6 On the basis of this, in some implementations of this embodiment, a heat-conducting column 512 is provided on the first clamp seat 51, a first positioning hole 522 matching the heat-conducting column 512 is provided on the second clamp seat 52, and a second positioning hole matching the heat-conducting column 512 is provided on the heat-conducting sheet 53; by providing the heat-conducting column 512, the first positioning hole 522, and the second positioning hole, positioning can be easily achieved, thereby making it easier to achieve that the heat-conducting sheet 53 is completely laid on the portion of the flexible strip line 200 located in the accommodating hole; in addition, the heat-conducting column 512 is in contact with the first positioning hole 522 and the second positioning hole, thereby further improving the heat dissipation effect.

[0074] In this embodiment, the material of the heat conducting sheet 53 is not specifically limited, and it can be a heat conducting material. In order to further improve the heat dissipation effect, the heat conducting sheet 53 is copper foil, the thickness of the copper foil is 0.02-0.05 mm, and the surface roughness of the copper foil is 0.5 μm-1.0 μm.

[0075] Since copper foil has good thermal conductivity, the use of copper foil improves the thermal conductivity. By setting the thickness to 0.02-0.05mm, the copper foil ensures thermal conductivity while also having good toughness, making it easier for the extension section to be clamped by the first clamping seat 51 and the second clamping seat 52 to achieve contact between the extension section and the wall surface of the first clamping seat 51 and the second clamping seat 52. The copper foil surface of this embodiment has a certain degree of roughness, which can increase the contact area between the copper foil and the surface of the flexible stripline 200, thereby improving the thermal conductivity efficiency. When the roughness of the copper foil is less than 0.5μm, it may not be enough to increase the contact area, affecting the thermal conductivity performance. When the roughness of the copper foil is greater than 1.0μm, it may cause uneven filling of the thermal conductive adhesive, thereby affecting the thermal conductivity efficiency. Therefore, 0.5μm-1.0μm is selected.

[0076] In this embodiment, the material of the first clamping base 51 is not specifically limited, and any heat-conductive material is sufficient. In order to further improve the heat dissipation effect, the material of the first clamping base 51 is oxygen-free copper.

[0077] In this embodiment, the material of the second clamping base 52 is not specifically limited, and any heat-conductive material is sufficient. To further improve the heat dissipation effect, the material of the second clamping base 52 is oxygen-free copper.

[0078] In this embodiment, the material of the heat-conducting column 512 is not specifically limited, and any heat-conducting material is sufficient. In order to further improve the heat dissipation effect, the material of the heat-conducting column 512 is oxygen-free copper.

[0079] As the number of qubits integrated on a quantum chip increases, the number of flexible striplines 200 required also increases. Although a heat sink assembly 50 can be added to ensure heat dissipation of more flexible striplines 200, the free space in the refrigerator is limited. Therefore, it is very necessary to be able to integrate more flexible striplines 200 in one heat sink assembly 50. In some implementations of this embodiment, the first clamping seat 51 is provided with a plurality of first grooves 511 arranged at intervals, and the second clamping seat 52 is provided with a plurality of second grooves 521 arranged at intervals. The first clamping seat 51 and the second clamping seat 52 are clamped together so that the plurality of first grooves 511 and the plurality of second grooves 521 form a plurality of receiving holes; each receiving hole is provided with a wire group. By providing a plurality of first grooves 511 and second grooves 521, this embodiment enables the heat sink assembly 50 to integrate more flexible striplines 200, meeting the requirements of high-qubit circuits.

[0080] For example, Figure 6As shown, when the first clamping seat 51 in the heat sink assembly 50 is provided with two first grooves 511, and the second clamping seat 52 is provided with two second grooves 521, two accommodating holes are formed, each accommodating hole is clamped with a wire group, and each wire group contains 4 flexible strip lines 200. At this time, two flexible strip lines 200 can be pasted on one thermal conductive sheet 53 (these two flexible strip lines 200 belong to different wire groups and are located in different accommodating holes), and a total of three thermal conductive sheets 53 are required. The heat sink assembly 50 can be used to integrate 8 flexible strip lines 200.

[0081] In this embodiment, the shapes of the first clamping seat 51 and the second clamping seat 52 are not specifically limited. For example, the first clamping seat 51 and the second clamping seat 52 have the same structure and are symmetrically arranged about the line group when clamped. Specifically, the first clamping seat 51 includes a first horizontal plate and a first vertical plate arranged perpendicular to the first horizontal plate, and a first groove 511 is set on the first vertical plate. The second clamping seat 52 includes a second horizontal plate and a second vertical plate arranged perpendicular to the second horizontal plate, and a second groove 521 is set on the second vertical plate. The first clamping seat 51 and the second clamping seat 52 are clamped so that the first groove 511 and the second groove 521 form a receiving hole.

[0082] In this embodiment, the way the heat sink is installed on the cold plate 400 is not specifically limited. For example, the heat sink is fixed to the cold plate 400 by a first screw. In order to further improve the heat dissipation effect, a copper gasket is provided between the first screw and the cold plate 400.

[0083] In this embodiment, the connection method between the first clamping seat 51 and the second clamping seat 52 is not specifically limited. For example, Figure 9 The left side view of the heat sink assembly 50 provided in the embodiment of the present invention Figure 1 ,like Figure 9 As shown, the first clamping seat 51 and the second clamping seat 52 are detachably connected by a second screw.

[0084] Figure 10 A side cross-sectional view of the flexible strip line 200 provided in an embodiment of the present invention Figure 1 ; Figure 11 A front cross-sectional view of the flexible strip line 200 provided in an embodiment of the present invention Figure 1 ;like Figure 5 、 Figure 10 and Figure 11 As shown, in some implementations of this embodiment, each of the flexible stripline 200 includes a first flexible stripline segment 10 and a second flexible stripline segment 20 disposed opposite to each other at first ends, and a fixing component 30;

[0085] The first flexible stripline segment 10 and the second flexible stripline segment 20 each include a first surface and a second surface opposite to each other;

[0086] The first surface of the first end of the first flexible stripline segment 10 exposes the first conductive layer 11; a first solder layer 13 is provided on the first conductive layer 11; the first surface of the first end of the second flexible stripline segment 20 exposes the second conductive layer 21; a second solder layer 23 is provided on the second conductive layer 21;

[0087] The fixing assembly 30 is used to press the first flexible strip line segment 10 and the second flexible strip line segment 20 together to make the first solder layer 13 and the second solder layer 23 contact each other, and to conduct heat to the first solder layer 13 and the second solder layer 23 so that they melt together after being heated.

[0088] In this embodiment, a first solder layer 13 is provided on the first conductive layer 11 of the first flexible stripline segment 10, and a second solder layer 23 is provided on the second conductive layer 21 of the second flexible stripline segment 20. Then, the first flexible stripline segment 10 and the second flexible stripline segment 20 are detachably crimped together by a fixing component 30 so that the first solder layer 13 and the second solder layer 23 are in contact. At the same time, the fixing component 30 conducts heat to the first solder layer 13 and the second solder layer 23 so that they melt together after being heated, thereby achieving electrical connection between the first flexible stripline segment 10 and the second flexible stripline segment 20.

[0089] It should be noted that this embodiment may further include a third flexible strip line segment, or even more. The third flexible strip line segment can be electrically connected to the first flexible strip line segment 10, and can also be electrically connected to the second flexible strip line segment 20. The specific electrical connection is achieved in the same way as the first flexible strip line segment 10 and the second flexible strip line segment 20, that is, by providing a solder layer and fixing the component 30 to achieve electrical connection.

[0090] To further improve the reliability of the electrical connection between the first flexible stripline segment 10 and the second flexible stripline segment 20, in some implementations of this embodiment, the flexible stripline 200 further includes a first metal layer 12 disposed between the first conductive layer 11 and the first solder layer 13; and a second metal layer 22 disposed between the second conductive layer 21 and the second solder layer 23. The provision of the first metal layer 12 and the second metal layer 22 improves soldering quality, thereby further enhancing the reliability of the electrical connection between the first flexible stripline segment 10 and the second flexible stripline segment 20.

[0091] In this embodiment, the fixing assembly 30 has two functions: first, it is used to achieve crimping of the first flexible ribbon segment 10 and the second flexible ribbon segment 20; second, it is used to conduct heat to the first solder layer 13 and the second solder layer 23, causing them to fuse together. Therefore, the structure of the fixing assembly 30 has a significant impact on the reliability of the electrical connection between the first flexible ribbon segment 10 and the second flexible ribbon segment 20.

[0092] To improve the reliability of the electrical connection between the first flexible stripline segment 10 and the second flexible stripline segment 20, in some implementations of this embodiment, the fixing assembly 30 includes: a first clamping block 31 for attaching to the second surface of the first flexible stripline segment 10; a second clamping block 32 for attaching to the second surface of the second flexible stripline segment 20; and a fastener for achieving a detachable connection between the first clamping block 31 and the second clamping block 32. In this embodiment, the first flexible stripline segment 10 and the second flexible stripline segment 20 are clamped together by the first clamping block 31 and the second clamping block 32, and the first clamping block 31 and the second clamping block 32 are connected by the fastener to press the first flexible stripline segment 10 and the second flexible stripline segment 20 together, so that the first solder layer 13 and the second solder layer 23 are effectively in contact, thereby achieving a reliable electrical connection between the first flexible stripline segment 10 and the second flexible stripline segment 20.

[0093] In order to further improve the reliability of the electrical connection between the first flexible stripline segment 10 and the second flexible stripline segment 20, in some implementations of this embodiment, as shown in FIG. Figure 10 As shown, the fastener includes a bolt 33, which is used to pass through the first clamping block 31 and the second clamping block 32 in sequence; a spring 34, which is mounted on the bolt 33 and positioned between the first clamping block 31 and the second clamping block 32; and a nut 35, which is threadedly engaged with the bolt 33 to achieve a detachable connection between the first clamping block 31 and the second clamping block 32. The fastener in this embodiment, by providing the spring 34, can achieve elastic compression of the first flexible stripline segment 10 and the second flexible stripline segment 20, thereby improving the reliability of the electrical connection.

[0094] Furthermore, in this embodiment, the pressure of the fixing assembly 30 on the first flexible strip segment 10 and the second flexible strip segment 20 can be adjusted by selecting springs 34 with different performances and different positions on the bolt 33 when tightening the nut 35, thereby affecting the welding effect. Therefore, in actual application, this embodiment can detect the final welding result according to the springs 34 with different performances or the nuts 35 tightened in different positions, and select the spring 34 performance and the tightening position of the nut 35 corresponding to the better final welding result.

[0095] In order to further improve the reliability of the electrical connection between the first flexible strip line segment 10 and the second flexible strip line segment 20, in some embodiments of this embodiment, a first limiting groove is provided on the first clamping block 31, and the width of the first limiting groove matches the width of the first flexible strip line segment 10; a second limiting groove is provided on the second clamping block 32, and the width of the second limiting groove matches the width of the second flexible strip line segment 20.

[0096] By providing a first limiting groove on the first clamping block 31 and a second limiting groove on the second clamping block 32, the first flexible strip line segment 10 and the second flexible strip line segment 20 are limited respectively, thereby facilitating the connection between the first flexible strip line segment 10 and the second flexible strip line segment 20 and ensuring the reliability of the electrical connection.

[0097] To further improve the reliability of the electrical connection between the first flexible stripline segment 10 and the second flexible stripline segment 20, in some implementations of this embodiment, the first conductive layer 11 includes multiple first conductive wires, each of which is deposited with the first metal layer 12 and coated with the first solder layer 13. The second conductive layer 21 includes multiple second conductive wires, each of which is deposited with the second metal layer 22 and coated with the second solder layer 23. The first solder layers 13 and the second solder layers 23 are in one-to-one contact with each other. This approach achieves a reliable one-to-one electrical connection between the multiple first conductive wires in the first flexible stripline segment 10 and the multiple second conductive wires in the second flexible stripline segment 20.

[0098] In order to further improve the reliability of the electrical connection between the first flexible stripline segment 10 and the second flexible stripline segment 20, in some implementations of this embodiment, the material of the first metal layer 12 is gold, and the material of the second metal layer 22 is gold; the first solder layer 13 and the second solder layer 23 are both solder paste.

[0099] In this embodiment, the first and second conductors can be signal wires made of the same material, illustratively, both phosphor bronze or beryllium copper. Of course, the first and second conductors can also be signal wires made of different materials. For example, when the flexible stripline 200 of this embodiment needs to pass through the cold plate 400 in a refrigerator, signal wires of different materials can be used. When the flexible stripline 200 needs to pass through the 4K cold plate 400, the flexible stripline 200 of this embodiment can be composed of a first flexible stripline segment 10 in which the first conductor is a conductive metal material with low thermal conductivity (such as phosphor bronze, beryllium copper, or silver) and a second flexible stripline segment 20 in which the second conductor is a superconducting material (such as niobium titanium). The first flexible stripline segment 10 is located in a temperature range above 4K, and the second flexible stripline segment 20 is located in a temperature range below or equal to 4K.

[0100] Regarding the heat conduction function of the fixing assembly 30, in order to ensure the heat conduction performance of the fixing assembly 30, the fixing assembly 30 is made of a heat conductive material. In addition, the heat source used and the arrangement relationship between the heat source and the fixing assembly 30 are not specifically limited. Two specific examples are given below.

[0101] Example 1: A hot air gun is used as a heat source. The hot air blown out by the hot air gun is aimed at the fixing component 30, thereby transferring heat to the first solder layer 13 and the second solder layer 23 so that the first solder layer 13 and the second solder layer 23 are melted together.

[0102] Example 2: Using a heater mounted on the fixing assembly 30 as a heat source; specifically, Figure 12 A side cross-sectional view of the flexible strip line 200 provided in an embodiment of the present invention Figure 2 ;like Figure 12 As shown, in Figure 10 On this basis, a mounting groove can be provided on the outer surface of the fixing component 30 , and a strip heater 40 can be installed in the mounting groove. The strip heater 40 heats the fixing component 30 and then conducts the heat to the first solder layer 13 and the second solder layer 23 .

[0103] It should be noted that, in this embodiment, after the first solder layer 13 and the second solder layer 23 are melted and fixed, the fixing assembly 30 can be removed.

[0104] Typically, the flexible stripline 200 includes not only a conductive layer but also insulating layers disposed on both sides of the conductive layer. Specifically, Figure 10 As shown, the first flexible stripline segment 10 in this embodiment further includes a first insulating layer 14 disposed on both sides of the first conductive layer 11, and the second flexible stripline segment 20 in this embodiment further includes a second insulating layer 24 disposed on both sides of the second conductive layer 21. In this embodiment, since the first solder layer 13 and the second solder layer 23 are melted to achieve electrical connection between the first flexible stripline segment 10 and the second flexible stripline segment 20, the first insulating layer 14 and the second insulating layer 24 are preferably made of a high-temperature resistant insulating material to prevent the heat required for soldering the first solder layer 13 and the second solder layer 23 from affecting the performance of the first insulating layer 14 and the second insulating layer 24. For example, the first insulating layer 14 and the second insulating layer 14 are both made of polyimide.

[0105] In some implementations of this embodiment, microwave components are integrated on the flexible strip line 200, thereby improving the integration of the entire measurement and control circuit. For example, the microwave components include attenuators, filters, and the like.

[0106] Based on the same application concept, embodiments of the present application also provide a quantum computer, including the aforementioned quantum measurement and control circuit and a signal source device external to the dilution refrigerator and a quantum chip within the dilution refrigerator connected by the quantum measurement and control circuit. The quantum computer of the present application includes the aforementioned quantum measurement and control circuit and thus has the same beneficial effects as the aforementioned quantum measurement and control circuit, which will not be further described here.

[0107] Throughout this specification, references to terms such as "some embodiments" or "examples" indicate that the specific features, structures, materials, or characteristics described in conjunction with such embodiments or examples are included in at least one embodiment or example of the present invention. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments. Furthermore, those skilled in the art may combine and reconcile the different embodiments or examples described in this specification.

[0108] The above description is merely a preferred embodiment of the present invention and does not limit the present invention in any way. Any person skilled in the art who, without departing from the scope of the present invention, makes any equivalent substitution, modification, or other variation to the technical solution and technical content disclosed herein shall be deemed to fall within the scope of the present invention and remain within the scope of protection of the present invention.

Claims

1. A sealing flange, characterized in that: The invention comprises a first end surface sealed and fixed on a room temperature disk of a dilution refrigerator, a second surface for sealing and fixing a plurality of flexible strip lines, and a hollow shell for sealingly connecting the first end surface and the second surface; Wherein, the first end surface is provided with a first through hole for the plurality of flexible strip lines to pass through; The second surface is provided with a plurality of second through holes, each second through hole is used for one of the flexible strip lines to pass through, and a sealing adhesive layer is provided in the gap between the flexible strip line and the second through hole; The area of the first end surface is smaller than the area of the second surface.

2. The sealing flange according to claim 1, characterized in that: A plurality of the second through holes are arranged in an array on the second surface; And / or, the second surface includes a second end surface opposite to the first end surface and / or at least one side surface connected to the second end surface.

3. The sealing flange according to claim 1, wherein: The hollow shell is trumpet-shaped, with an end having a smaller opening being sealedly connected to the first end surface, and an end having a larger opening being sealedly connected to the second surface.

4. The sealing flange according to claim 1, wherein: The hollow shell includes a bellows and an outward expansion tube; one end of the bellows is sealed and connected to the first end face, the other end of the bellows is connected to the end with a smaller opening of the outward expansion tube, and the other end of the outward expansion tube with a larger opening is sealed and connected to the second face.

5. A quantum measurement and control circuit based on flexible strip lines, characterized in that: comprising a plurality of flexible ribbons and a sealing flange as claimed in any one of claims 1 to 4; One end of the flexible strip line is electrically connected to a signal source or a measuring device, and the other end is electrically connected to a quantum chip.

6. The quantum measurement and control circuit based on flexible strip lines according to claim 5, characterized in that: It also includes a heat sink assembly arranged on each cold plate of the dilution refrigerator, The heat sink assembly includes a heat sink seat and a heat conducting sheet; The heat sink seat includes a first clamp seat and a second clamp seat that are detachably connected, and the first clamp seat and the second clamp seat form a receiving hole when they are clamped together; the receiving hole is used to accommodate a wire group including a plurality of flexible strip lines, and the thermal conductive sheet is attached between any two adjacent flexible strip lines in the wire group, and the extension section of the thermal conductive sheet beyond the receiving hole is in contact with the wall surface of the clamping point of the first clamp seat and the second clamp seat; the heat sink seat is installed on the cold plate.

7. The quantum measurement and control circuit based on flexible strip lines according to claim 5, characterized in that: Each of the flexible strip lines comprises a first flexible strip line segment and a second flexible strip line segment disposed opposite to each other at first ends, and a fixing component; The first flexible stripline segment and the second flexible stripline segment each include opposing first and second surfaces; The first surface of the first end of the first flexible stripline segment exposes a first conductive layer; a first solder layer is provided on the first conductive layer; the first surface of the first end of the second flexible stripline segment exposes a second conductive layer; a second solder layer is provided on the second conductive layer; The fixing assembly is used to detachably press the first flexible strip line segment and the second flexible strip line segment together to make the first solder layer and the second solder layer contact each other, and to conduct heat to the first solder layer and the second solder layer so that they melt together after being heated.

8. The quantum measurement and control circuit based on flexible strip lines according to claim 7 is characterized in that: The fixing assembly includes: a first clamping block, configured to be attached to the second surface of the first flexible strip segment; a second clamping block, configured to be attached to the second surface of the second flexible strip segment; A fastener is used to achieve a detachable connection between the first clamping block and the second clamping block.

9. The quantum measurement and control circuit based on flexible strip lines according to claim 5, characterized in that: Microwave components are integrated on the flexible strip line.

10. A quantum computer comprising the quantum measurement and control circuit according to any one of claims 5 to 9 and a signal source device external to the dilution refrigerator and a quantum chip internal to the dilution refrigerator connected by the quantum measurement and control circuit.

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