Superconducting quantum chip and quantum computing device
By utilizing the resonant mode of the packaging box and the magnetic flux bias line to adjust the frequency in a superconducting quantum chip, combined with the Purcell effect, a fast and high-fidelity resetting of qubits was achieved, solving the problems of long time consumption and high complexity in existing technologies, and improving the efficiency and reliability of quantum computing.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- SHENZHEN SPINQ TECHNOLOGY CO LTD
- Filing Date
- 2025-04-23
- Publication Date
- 2026-05-08
AI Technical Summary
Existing quantum bit reset methods are time-consuming, rely on additional hardware, and are complex, making it difficult to meet the requirements for fast and high-fidelity resets, thus affecting the efficiency and reliability of quantum computing.
The superconducting quantum chip design utilizes the resonant mode of the package as the resonant cavity for all qubits, and adjusts the frequency of the qubits through magnetic flux bias lines to achieve resonance. Combined with the Purcell effect to enhance energy dissipation, it achieves fast and high-fidelity resetting, avoiding additional hardware and complex control.
It enables fast and high-fidelity resetting of qubits, reduces hardware costs and control complexity, supports higher density qubit integration, reduces state transitions caused by measurement, and improves the efficiency and reliability of quantum computing.
Smart Images
Figure CN224217115U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of quantum information technology, and in particular to a superconducting quantum chip and a quantum computing device. Background Technology
[0002] Resetting a qubit is one of the key operations in quantum computing. Its goal is to restore the qubit to a known initial state (such as the |0> state) to ensure the accuracy of subsequent calculations. Fast and high-fidelity qubit resetting is a core element in ensuring computational efficiency and reliability.
[0003] The importance of fast and accurate resetting of qubits includes the following aspects:
[0004] 1. The rapid and accurate resetting of qubits is beneficial to improving computational efficiency and speed;
[0005] 2. The starting point of quantum computing requires that the qubit be in a precise ground state. Resetting the qubit can ensure the high fidelity of the initial state of the qubit.
[0006] 3. Facilitates support for complex quantum algorithms and error correction. Quantum error correction coding (such as surface codes) requires frequent measurement and resetting of auxiliary qubits. If the qubit reset speed is insufficient, the error correction period may exceed the coherence time of the qubit, leading to information loss. For example, fast parameter reset protocols (such as microwave-driven methods) can achieve sub-microsecond operations without relying on the qubit lifetime, providing a time window for dynamic error correction.
[0007] 4. Facilitates scalability and practical applications. Quantum bit reuse compilation techniques (such as intermediate circuit measurement and resetting) allow a single physical qubit to simulate multiple logic bits, reducing hardware requirements. Its feasibility depends on the efficient resetting capability of qubits.
[0008] Existing methods for resetting qubits include: traditional passive reset methods, which rely on the qubit to naturally decay to the ground state (|0>) through spontaneous emission or relaxation processes. This process is time-consuming (e.g., 100 microseconds) and is limited by the lifetime of the qubit and the system temperature, potentially resulting in residual excited-state errors. To overcome the problems of passive reset methods, Purcell effect-enhanced reset methods have emerged. This method uses an additional resonator called a Purcell resonator. However, using a resonator of the same frequency for reading and resetting has serious limitations. It requires a resonator frequency lower than the maximum qubit frequency to ensure compatibility with the popular transmon (transmission line shunted plasma oscillation qubit) qubit design.
[0009] Technologies compatible with the popular transmon qubit design also include microwave-driven dissipation and quantum circuit cryocooling methods. However, these methods involve additional hardware costs and relatively complex control methods. Utility Model Content
[0010] In view of the above problems, this utility model is proposed to provide a superconducting quantum chip and quantum computing device that overcomes or at least partially solves the above problems.
[0011] In a first aspect, this utility model provides a superconducting quantum chip, comprising: a packaging box, a PCB, and a superconducting quantum chip body, wherein the superconducting quantum chip body is stacked on the PCB, and the superconducting quantum chip body and the PCB are packaged together inside the packaging box;
[0012] The superconducting quantum chip body includes a superconducting quantum circuit, comprising: a readout signal line, multiple superconducting resonant cavities, multiple qubits, and multiple magnetic flux bias lines connected to each qubit respectively;
[0013] The plurality of qubits are respectively coupled to the readout signal line through a connected superconducting resonant cavity;
[0014] The magnetic flux bias line is used to transmit a corresponding first frequency control signal to the connected quantum bit when a quantum bit reset operation is required, so as to adjust the frequency of the quantum bit to reach the resonant frequency of the package itself to achieve resonance with the package.
[0015] In one embodiment, the superconducting quantum chip body is disposed at a predetermined position on the PCB by welding or bonding.
[0016] In one embodiment, the magnetic flux bias line is further used to input a second frequency control signal to the quantum bit in the measurement state of the quantum bit. The second frequency control signal is used to control the quantum bit to be at a preset operating frequency. The resonant frequency of the package itself is less than the minimum value of the range of the operating frequency of the quantum bit, and the frequency difference between the two is greater than or equal to a preset threshold. The preset threshold is the minimum value of the frequency difference between the package and the quantum bit to avoid resonance.
[0017] In one embodiment, the frequency difference between the minimum operating frequency of the qubit and the resonant frequency of the package itself is greater than 1 GHz.
[0018] In one embodiment, the measurement and reset operations of the qubit are performed in a time-division manner, and the superconducting resonant cavity is activated in the measurement state of the qubit and deactivated in the reset state of the qubit.
[0019] In one embodiment, the first frequency control signal and the second frequency control signal are DC bias pulse signals.
[0020] In one embodiment, the length of the internal cavity of the encapsulation box is an integer multiple of 1 / 2 of the wavelength of the electromagnetic wave.
[0021] In one embodiment, the geometry and material of the packaging box are determined in advance through an electromagnetic simulation optimization process to reduce the quality factor.
[0022] In one embodiment, the superconducting resonant cavity has a frequency range of 7 GHz to 7.5 GHz, the maximum frequency range of the qubit is 5 GHz to 5.5 GHz, and the resonant frequency of the encapsulation box is 3 to 4 GHz.
[0023] In one embodiment, the superconducting quantum chip further includes: multiple XY lines;
[0024] Each of the XY lines is connected to the qubit and is used to drive the qubit via microwave pulses.
[0025] Secondly, this utility model embodiment provides a quantum computing device, which includes the superconducting quantum chip as described above.
[0026] The beneficial effects of the above-mentioned technical solutions provided by the embodiments of this utility model include at least the following:
[0027] The superconducting quantum chip and quantum computing device provided in this embodiment are based on the Purcell effect to enhance reset, but without using an additional low-Q Purcell resonator on the chip circuit. Instead, the resonant mode of the superconducting quantum chip package is directly used as the resonant cavity for all qubits on the entire quantum chip. All qubits can be coupled simultaneously, and the frequency of each qubit can be adjusted by the first frequency control signal of the magnetic flux bias line to achieve resonance with the resonant cavity of the package, thereby achieving rapid energy dissipation and achieving rapid and high-fidelity reset of the qubits. Since no additional quantum chip hardware is added, the hardware cost is reduced, the chip layout area is saved to support the integration of higher density qubits, and the control complexity is reduced. Furthermore, it does not affect the design of conventional superconducting resonant cavities (readout resonators) in superconducting quantum circuits, reducing state transitions caused by measurement.
[0028] Other features and advantages of this invention will be set forth in the description which follows, and will be apparent in part from the description, or may be learned by practicing the invention. The objects and other advantages of this invention may be realized and obtained by means of the structures particularly pointed out in the written description, claims, and drawings.
[0029] The technical solution of this utility model will be further described in detail below with reference to the accompanying drawings and embodiments. Attached Figure Description
[0030] The accompanying drawings are provided to further illustrate the present invention and form part of the specification. They are used together with the embodiments of the present invention to explain the present invention, but do not constitute a limitation thereof. In the drawings:
[0031] Figure 1 This is a schematic diagram of the overall structure of the superconducting quantum chip in an embodiment of this utility model;
[0032] Figure 2 This is a circuit diagram of the superconducting quantum circuit in an embodiment of this utility model;
[0033] Figure 3 This is a schematic diagram showing the correspondence between the scanned quantum bit frequency and the Z-line voltage amplitude value in an embodiment of this utility model.
[0034] Figure 4 For the embodiments of this utility model Figure 3 The relationship between the frequency of the qubit and the voltage amplitude of the Z-line is fitted to obtain a schematic diagram of the functional relationship between the frequency of the qubit and the voltage amplitude of the Z-line.
[0035] Figure 5 This is a structural block diagram of the quantum computing device in an embodiment of the present invention.
[0036] Explanation of reference numerals in the attached figures:
[0037] 1-Packaging box; 2-Superconducting quantum chip body; 3-Superconducting quantum chip; 4-Controller; 5-PCB;
[0038] 11-Top cover; 12-Bottom cover;
[0039] 21-Read signal line; 22-Superconducting resonant cavity; 23-Quantum bit; 24-Magnetic flux bias line (Z line); 25-XY line. Detailed Implementation
[0040] Exemplary embodiments of the present disclosure will now be described in more detail with reference to the accompanying drawings. While exemplary embodiments of the present disclosure are shown in the drawings, it should be understood that the present disclosure may be implemented in various forms and should not be limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the scope of the disclosure to those skilled in the art.
[0041] In the description of this application, it should be understood that the terms "center", "upper", "lower", "left", "right", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this application.
[0042] 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 number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this application, "multiple" means at least two, such as two, three, etc., unless otherwise explicitly specified.
[0043] The inventors of this application have discovered that, in order to couple the energy of the excited state of a qubit to the resonant cavity and accelerate energy dissipation, existing technologies typically use an additional resonator (Purcell resonator) to shorten the spontaneous emission time by enhancing the coupling between the qubit and the environment (Purcell effect). However, this design suffers from severe limitations in using resonators of the same frequency for readout and reset; it requires a resonator frequency lower than the maximum frequency of the qubit to achieve compatibility with common transmon qubit design schemes. These schemes involve additional hardware costs and increase the complexity of controlling quantum computing devices.
[0044] To address the aforementioned problems in the prior art, this utility model provides a superconducting quantum chip, referring to... Figure 1 As shown, it includes: a packaging box 1, a PCB 5, and a superconducting quantum chip body 2. Figure 1 (Not shown in the diagram); the superconducting quantum chip body 2 is stacked on the PCB 5, and the superconducting quantum chip body 2 and the PCB 5 are packaged together inside the packaging box 1;
[0045] The superconducting quantum chip body 2 includes a superconducting quantum circuit (specific structure) Figure 1 (Not shown in the text);
[0046] Reference Figure 2 As shown, the superconducting quantum circuit specifically includes: a readout signal line 21, multiple superconducting resonant cavities 22, multiple qubits 23, and multiple magnetic flux bias lines 24 connected to each qubit 23; wherein:
[0047] Multiple qubits 23 are coupled to readout signal lines 21 through a superconducting resonant cavity 22;
[0048] The magnetic flux bias line 24 is used to transmit a corresponding first frequency control signal to the connected quantum bit 23 when a reset operation is required, so as to adjust the frequency of the quantum bit 23 to reach the resonant frequency of the package box 1 itself so as to achieve resonance with the package box 1.
[0049] Figure 2 The diagram shown is a schematic of a superconducting quantum circuit. In actual implementation, based on the components and their connections in the schematic of the superconducting quantum circuit, the corresponding integrated circuit can be generated by laying out and wiring on the substrate according to certain rules and process requirements.
[0050] In practice, superconducting quantum circuits can be implemented through a superconducting quantum chip (an integrated circuit). The superconducting quantum circuit can be the superconducting quantum chip itself or as part of the superconducting quantum chip.
[0051] In one embodiment, refer to Figure 1 As shown, the structure of the above-mentioned packaging box 1 may specifically include an upper cover 11 and a lower cover 12. The superconducting quantum chip body 2 is set on a predetermined position (such as the center position of the PCB 5) on the PCB 5 by means of welding, bonding or other methods.
[0052] The present invention does not limit the specific structure of the packaging box or the packaging method.
[0053] The superconducting quantum chip 3 provided in this embodiment of the present invention is based on the principle of Purcell effect-enhanced reset, but does not use an additional low-Q Purcell resonator on the chip circuit. Instead, it directly uses the resonant mode of the packaging box 1 of the superconducting quantum chip 3 as the resonant cavity for all qubits on the entire quantum chip. It can simultaneously couple all qubits, and adjust the frequency of each qubit through the first frequency control signal of the magnetic flux bias line to achieve resonance with the resonant cavity of the packaging box 1, thereby achieving rapid energy dissipation and achieving the purpose of rapid and high-fidelity reset of qubits. Since no additional quantum chip hardware is added, the hardware cost is reduced, the chip layout area is saved to support the integration of higher density qubits, and the control complexity is reduced. It also does not affect the design of conventional superconducting resonant cavities (readout resonators) in superconducting quantum circuits, and reduces state transitions caused by measurement.
[0054] In one embodiment, the packaging box 1 has a sealed metal cavity, which may be made of copper or aluminum. This embodiment of the present invention does not limit the specific material.
[0055] The electromagnetic waves generated by the resonant electromagnetic waves in the metal cavity of the encapsulation box 1 are reflected multiple times between the internal metal walls, forming standing waves. When the geometry of the cavity (such as length, width, and height) meets certain conditions, the wavelength of the electromagnetic waves matches the dimensions of the cavity, resulting in equal average energy of the electric and magnetic fields, thus causing resonance at a specific frequency (i.e., the resonant frequency).
[0056] Reference Figure 2 In the superconducting quantum circuit shown, there are multiple superconducting resonant cavities 22, each of which is connected to a quantum bit 23. The superconducting resonant cavity 22 is also called a readout resonator. During measurement, the quantum bit 23 is coupled to the superconducting resonant cavity 22. The change in the state of the quantum bit 23 will cause a shift in the frequency of the superconducting resonant cavity 22. By measuring this shift, the state of the quantum bit 23 can be read.
[0057] The read signal line 21 is coupled with multiple qubits 23. The read signal comes from the read in end (read input end) and from the readout end (read output end).
[0058] Each read signal line 21 can use a superconducting coaxial cable or optical fiber to transmit the signal from the superconducting resonant cavity 22 to the measuring device.
[0059] Reference Figure 2 As shown, multiple qubits 23 are connected to the superconducting resonant cavity 22 through capacitors to achieve capacitive coupling.
[0060] exist Figure 2 In this design, the flux bias line 24, also known as the Z-line, is a superconducting wire integrated on the superconducting quantum chip. It can be designed as a loop or a spiral, positioned close to the Josephson junction of the qubit. When current flows through the Z-line, it generates magnetic flux in the loop of the qubit. The energy level difference (frequency) of the qubit is determined by the characteristics of its Josephson junction, which are sensitive to the generated magnetic flux. The injected magnetic flux changes the effective energy of the Josephson junction, thereby directly adjusting the operating frequency of the qubit. By rapidly changing the current (in pulse form) in the Z-line, the qubit frequency can be precisely adjusted within nanoseconds, enabling quantum gate operations or quantum gate resets.
[0061] In one embodiment, the aforementioned magnetic flux bias line 24 (Z line) is also used to input a second frequency control signal to the quantum bit 23 in the measurement state of the quantum bit 23. The second frequency control signal is used to control the quantum bit 23 to be at a preset operating frequency. The range of the operating frequency of the quantum bit 23 is far away from the resonant frequency of the packaging box 1 itself to avoid resonance.
[0062] In this embodiment of the invention, the range of operating frequencies of the quantum bit 23, far from the resonant frequency of the packaging box 1 itself, means that the minimum value of the range where the resonant frequency of the packaging box 1 is less than the operating frequency of the quantum bit 23, and the frequency difference between the two is greater than or equal to a preset threshold. The preset threshold is the minimum value of the frequency difference between the packaging box 1 and the quantum bit 23 that prevents resonance.
[0063] Preferably, the frequency difference between the minimum operating frequency of the quantum bit 23 and the resonant frequency of the package 1 itself is greater than 1 GHz.
[0064] For example, the frequency range of the superconducting resonant cavity 22 is 7GHz-7.5GHz, the maximum frequency range of the quantum bit 23 is 5GHz-5.5GHz, and the resonant frequency of the package 1 can be designed to be 3-4GHz.
[0065] When resetting qubit 23, its frequency needs to be far from its readout frequency. This reduces the inelastic transitions induced by the measurement photon.
[0066] For the design of package 1, in order to achieve the preset resonant frequency, the geometry, material and Q value of the cavity need to be considered during the design process.
[0067] For example, within the cavity of package 1, electromagnetic waves can only resonate at a certain frequency. Therefore, the length of the package (the longer side) must ensure that the wavelength of the electromagnetic wave is at least half a wavelength (L / 2) to form effective interference within the resonant cavity, i.e., L = nλ / 2, where n is a positive integer, λ is the wavelength of the electromagnetic wave in air or a medium, and L is the length of the cavity. In other words, the length of the cavity of package 1 is equal to an integer multiple of half the wavelength of the electromagnetic wave.
[0068] Furthermore, since the encapsulation box 1 is made of metal, the high conductivity of its metal cavity reduces energy consumption and makes the resonance effect more significant. Therefore, the dissipation rate can be adjusted by changing the Q value (quality factor, a key parameter for measuring resonator performance) of the metal cavity. Generally speaking, the smaller the Q value, the faster the energy dissipation rate when the quantum bit is reset.
[0069] Factors affecting the Q value include radiation loss, adsorption loss, and conductor loss; among which:
[0070] Radiation loss is the energy loss of electromagnetic waves from the resonant cavity through conduction, radiation, and other means.
[0071] Adsorption loss occurs when electromagnetic waves interact with the actual dielectric material as they enter and exit the cavity and are not completely reflected at the boundary, causing the absorbed portion to be converted into heat energy and lost.
[0072] Conductor losses are caused by induced currents in high-frequency fields, which provide useful capacitance or inductance to the resonant cavity, while also causing power loss in high-frequency fields.
[0073] Since resonators of different shapes have different electromagnetic field distributions and loss characteristics, for example, the size of the package and the selection of appropriate materials can be designed through simulation. During the simulation process, the distribution of electric and magnetic fields can be changed. On the basis of achieving the preset resonant frequency, radiation loss, adsorption loss and conductor loss can be increased as much as possible to reduce the Q value and achieve the ideal energy dissipation rate.
[0074] In one embodiment, both the first frequency control signal and the second frequency signal are DC bias pulse signals.
[0075] In one embodiment, when a reset operation of qubit 23 is required, the voltage of the aforementioned DC bias pulse signal can be predetermined in the following manner:
[0076] The correspondence between the frequency of the qubit and the voltage amplitude of the DC bias pulse signal input to the magnetic flux bias line is determined in advance by scanning;
[0077] Based on the correspondence between the frequency of the quantum bit and the voltage of the DC bias pulse signal input to the magnetic flux bias line, a function curve of the frequency of the quantum bit and the voltage amplitude of the DC bias pulse signal is fitted.
[0078] When it is necessary to reset the qubit 23, the voltage amplitude of the DC bias pulse signal corresponding to the resonant frequency of the package 1 is determined according to the function curve.
[0079] For example, refer to Figure 3 As shown, Figure 3 This represents the correspondence between the frequency of the scanned qubit and the amplitude of the Z-line voltage. Figure 3 In the diagram, the horizontal axis represents the frequency of the quantum bit, and the vertical axis represents the voltage amplitude of the Z-line.
[0080] Figure 4 It is aimed at Figure 3 The correspondence between the frequency of the qubit and the voltage amplitude of the Z-line is fitted to obtain the functional relationship between the frequency of the qubit and the voltage amplitude of the Z-line (the horizontal axis is the voltage amplitude of the Z-line, and the vertical axis is the frequency of the qubit).
[0081] When it is necessary to reset the state of qubit 23, a magnetic flux bias pulse corresponding to the resonant frequency is applied through the Z line to quickly adjust the frequency of the target qubit from the maximum frequency to the resonant frequency of the packaging box 1, thereby causing it to resonate with the packaging box 1. When qubit 23 resonates with the packaging box 1, its excited state energy is released into the packaging cavity of the packaging box 1 through the enhanced radiation frequency of the Purcell effect, and further dissipated to the low temperature environment through the cavity, thereby quickly resetting the state of qubit 23.
[0082] In one embodiment, the superconducting quantum chip 3 may further include: multiple XY lines 25, each XY line 25 being connected to a quantum bit 23, and the XY lines 25 driving the quantum bit 23 via microwave pulses.
[0083] In this embodiment of the invention, the XY line refers to a microwave line on which a quantum bit driving signal (commonly referred to as the XY signal) can be transmitted. The XY signal is used to drive the quantum bit to switch between the |0> state and the |1> state. The XY signal is, for example, a microwave pulse.
[0084] In one embodiment, the measurement and reset operations of the qubit 23 are performed in a time-division manner, and the superconducting resonant cavity 22 is activated in the measurement state of the qubit 23, but not activated in the reset state of the qubit 23.
[0085] The superconducting quantum chip provided in this embodiment of the present invention does not require the integration of a low-Q Purcell resonator on the superconducting quantum circuit, thus saving the layout area of the chip circuit. It can support higher density quantum bit integration (achieving the integration of more than 100 quantum bits). A single package can serve all the quantum bits of the entire chip at the same time, avoiding the need to customize the corresponding energy dissipation structure for each quantum bit. Moreover, the modification of the package is easy to be compatible with existing superconducting quantum chip manufacturing processes. There is no need to develop new Josephson junctions or coupling structures. The implementation method is simple and will not increase additional hardware costs.
[0086] This utility model embodiment also provides a quantum computing device, see reference. Figure 5 As shown, the quantum computing device includes a controller 4 and a superconducting quantum chip 3 as described in the foregoing embodiment; wherein:
[0087] The controller 4 is used to send a first frequency control signal to the quantum bit through multiple magnetic flux bias lines of the superconducting quantum chip 3 when a reset operation of the quantum bit is required. The first frequency control signal is used to adjust the frequency of the quantum bit to reach the resonant frequency of the packaging box 1 to achieve resonance with the packaging box 1.
[0088] The aforementioned quantum computing devices may also include quantum measurement devices, etc. The specific structure and function of quantum measurement devices can be referred to existing technologies, and will not be elaborated here.
[0089] Obviously, those skilled in the art can make various modifications and variations to this utility model without departing from its spirit and scope. Therefore, if these modifications and variations fall within the scope of the claims of this utility model and their equivalents, this utility model also intends to include these modifications and variations.
Claims
1. A superconducting quantum chip, characterized in that, include: The package includes a packaging box, a PCB, and a superconducting quantum chip body, wherein the superconducting quantum chip body is stacked on the PCB, and the superconducting quantum chip body and the PCB are packaged together inside the packaging box. The superconducting quantum chip body includes a superconducting quantum circuit; The superconducting quantum circuit includes: a readout signal line, multiple superconducting resonant cavities, multiple qubits, and multiple magnetic flux bias lines connected to each qubit respectively; The plurality of qubits are respectively coupled to the readout signal line through a connected superconducting resonant cavity; The magnetic flux bias line is used to transmit a corresponding first frequency control signal to the connected quantum bit when a quantum bit reset operation is required, so as to adjust the frequency of the quantum bit to reach the resonant frequency of the package itself to achieve resonance with the package.
2. The superconducting quantum chip as described in claim 1, characterized in that, The superconducting quantum chip body is mounted on a predetermined position on the PCB by welding or bonding.
3. The superconducting quantum chip as described in claim 1, characterized in that, The magnetic flux bias line is also used to input a second frequency control signal to the quantum bit in the measurement state of the quantum bit. The second frequency control signal is used to control the quantum bit to be at a preset operating frequency. The resonant frequency of the packaging box itself is less than the minimum value of the range of the operating frequency of the quantum bit, and the frequency difference between the two is greater than or equal to a preset threshold. The preset threshold is the minimum value of the frequency difference between the packaging box and the quantum bit to avoid resonance.
4. The superconducting quantum chip as described in claim 3, characterized in that, The frequency difference between the minimum operating frequency of the quantum bit and the resonant frequency of the packaging box itself is greater than 1 GHz.
5. The superconducting quantum chip as described in claim 1, characterized in that, The measurement and reset operations of the qubit are performed in a time-division manner. The superconducting resonant cavity is activated when the qubit is being measured, but not when the qubit is being reset.
6. The superconducting quantum chip as described in claim 3, characterized in that, The first frequency control signal and the second frequency control signal are DC bias pulse signals.
7. The superconducting quantum chip as described in claim 1, characterized in that, The length of the internal cavity of the packaging box is equal to an integer multiple of 1 / 2 of the wavelength of the electromagnetic wave.
8. The superconducting quantum chip according to any one of claims 1-7, characterized in that, The superconducting resonant cavity has a frequency range of 7GHz-7.5GHz, the maximum frequency range of the qubit is 5GHz-5.5GHz, and the resonant frequency of the encapsulation box is 3-4GHz.
9. The superconducting quantum chip according to any one of claims 1-7, characterized in that, Also includes: Multiple XY lines; Each of the XY lines is connected to the qubit and is used to drive the qubit via microwave pulses.
10. A quantum computing device, characterized in that, The quantum computing device includes the superconducting quantum chip as described in any one of claims 1-9.