Radio frequency module system, quantum calculation measurement and control system and quantum computer

Abstract

The utility model relates to the technical field of quantum computing, in particular to a radio frequency module system, a quantum computing measurement and control system and a quantum computer, and the system comprises a clock source which is used for providing a reference clock signal; the input end of the power distribution module is electrically connected with the output end of the clock source, and the power distribution module is used for dividing the reference clock signal into multiple paths of reference clock signals and respectively outputting the multiple paths of reference clock signals through multiple output ports; and the radio frequency module is used for receiving each path of reference clock signal and generating a local oscillator signal with stable phase difference based on the reference clock signal. According to the invention, the reference clock signal provided by the clock source is divided into multiple paths of reference clock signals by arranging the power distribution module outside the radio frequency module, so that the reference clock signals received by the plurality of radio frequency modules in the radio frequency module are kept consistent, and the paths passed by the reference clock signals in each radio frequency module are ensured to be the same; and the phase difference stability of the local oscillator signal generated by the radio frequency module is improved.

Description

Technical Field

[0001] The present application relates to the field of quantum computing technology, and in particular to a radio frequency module system, a quantum computing measurement and control system, and a quantum computer. Background Art

[0002] The frequency of the quantum control signal of the quantum computing measurement and control system is generally between 4GHz and 8GHz. In order to ensure the operating accuracy of the quantum chip, the phase stability of the quantum control signal is usually required to be relatively high. At present, the more mature way to generate quantum control signals is to mix the baseband signal to the range of 4GHz to 8GHz through one or more RF modules. The reference clock signal is essential when the RF module is running. The existing reference clock signal will be affected by the internal circuit of the RF module when passing through the first RF module. The reference clock signal input to the second RF module is different from the reference clock signal input to the first RF module, resulting in poor phase difference stability between the RF transmission channels of each RF module, which directly affects the phase stability of the quantum control signal after mixing. Therefore, how to optimize the phase difference stability between the RF transmission channels of each RF module is a technical problem that needs to be solved urgently. Utility Model Content

[0003] The purpose of this application is to provide a radio frequency module system, a quantum computing measurement and control system and a quantum computer, which are used to solve the problem of poor phase difference stability between radio frequency transmission channels of each radio frequency module in the prior art.

[0004] In order to solve the above technical problems, the present invention proposes a radio frequency module system, comprising:

[0005] A clock source, used to provide a reference clock signal;

[0006] A power distribution module, the input end of which is electrically connected to the output end of the clock source, and is used to divide the reference clock signal into multiple reference clock signals and output them respectively through multiple output ports;

[0007] The radio frequency module includes a plurality of radio frequency modules, each of which is used to receive a reference clock signal and generate a local oscillator signal with a stable phase difference based on the reference clock signal.

[0008] Optionally, the power distribution module includes a plurality of power distributors, and the number of the radio frequency modules is positively correlated with the number of the power distributors.

[0009] Optionally, the output end of the power distributor is electrically connected to the input end of the radio frequency module via a radio frequency cable, and a signal shielding layer is provided on the radio frequency cable.

[0010] Optionally, the power distribution module further includes a power amplifier, an output end of the power amplifier is electrically connected to an input end of the power distributor, and an input end of the power amplifier is electrically connected to an output end of the clock source.

[0011] Optionally, the distance between the output end of the power divider and the input ends of the multiple radio frequency modules is within a first preset distance range.

[0012] Optionally, the power divider is a passive power divider.

[0013] Optionally, the radio frequency module and the power distribution module are arranged in a containing space formed by a thermal insulation material.

[0014] Optionally, the thermal insulation material includes polytetrafluoroethylene.

[0015] Based on the same inventive concept, the present application also proposes a quantum computing measurement and control system, including an RF module system described in any one of the above-mentioned feature descriptions, wherein the RF module is enabled to generate a local oscillator signal with a stable phase difference through the RF module system, and the RF module outputs a RF signal based on the local oscillator signal.

[0016] Based on the same inventive concept, the present application also proposes a quantum computer, comprising a quantum computing measurement and control system and a quantum chip described in any one of the above-mentioned feature descriptions, wherein the quantum chip performs quantum operations based on the radio frequency signal output by the quantum computing measurement and control system.

[0017] Compared with the prior art, this application has the following beneficial effects:

[0018] The present application divides the reference clock signal provided by the clock source into multiple reference clock signals by setting a power distribution module outside the RF module, and outputs the reference clock signal through multiple output ports of the power distribution module, so that the reference clock signals received by multiple RF modules in the RF module remain consistent. At the same time, since multiple RF modules work independently, the reference clock signal is guaranteed to pass through the same path in each RF module, thereby improving the phase difference stability of the local oscillator signal generated by the RF module. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 A radio frequency module system proposed in the prior art;

[0020] Figure 2 A schematic diagram of a radio frequency module system proposed in an embodiment of the present utility model;

[0021] Figure 3 A detailed schematic diagram of a radio frequency module system proposed in an embodiment of the present utility model;

[0022] Figure 4 A schematic diagram of another radio frequency module system proposed in an embodiment of the present utility model;

[0023] Figure 5 A structural diagram of a radio frequency module system proposed in an embodiment of the present utility model. DETAILED DESCRIPTION

[0024] The specific implementation of the present invention will be described in more detail below in conjunction with the schematic diagram. The advantages and features of the present invention will become clearer from the following description and claims. It should be noted that the drawings are all in a very simplified form and are not in exact proportions, and are only used to facilitate and clearly assist in explaining the purpose of the embodiments of the present invention.

[0025] In the description of the present invention, it is necessary to understand that the terms "center", "up", "down", "left", "right", etc. indicate directions or positional relationships 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.

[0026] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of the present invention, the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0027] In the existing RF module system, the reference clock signal will be affected by the circuit inside the RF module when passing through the first RF module, resulting in a difference between the reference clock signal input to the second RF module and the reference clock signal input to the first RF module. Figure 1 The figure shows a radio frequency module system proposed by the prior art. Before the reference clock signal output by the clock source 1 reaches the second radio frequency module 20, it will pass through the first radio frequency module 20. When passing through the first radio frequency module 20, the reference clock signal will be affected by the operation of the radio frequency components inside the radio frequency module, resulting in a difference between the reference clock signal transmitted by the power divider 30 to the second radio frequency module 20 and the reference clock signal received by the first radio frequency module 20. This results in poor stability of the phase difference between the radio frequency transmission channels of each radio frequency module, which directly affects the phase stability of the quantum control signal after mixing. Therefore, the present application proposes a radio frequency module system, a quantum computing measurement and control system, and a quantum computer to ensure that the reference clock signal takes the same path in each radio frequency module, thereby improving the phase difference stability of the local oscillator signal generated by the radio frequency module.

[0028] Reference Figure 2 A schematic diagram of a radio frequency module system is proposed for this application, including:

[0029] Clock source 1, used to provide a reference clock signal;

[0030] A power distribution module 3, the input end of the power distribution module 3 is electrically connected to the output end of the clock source 1, and is used to divide the reference clock signal into multiple reference clock signals and output them respectively through multiple output ports;

[0031] The radio frequency module 2 includes a plurality of radio frequency modules 3, each of the radio frequency modules 20 is used to receive one reference clock signal and generate a local oscillator signal with a stable phase difference based on the reference clock signal.

[0032] In an optional embodiment, the radio frequency module 2 has two radio frequency modules 20 as an example for description. Figure 2 As shown, the clock source 1 provides a reference clock signal to the power distribution module 3 arranged outside the RF module 2. The power distribution module 3 divides the received reference clock signal into two paths and inputs them into the two RF modules 20 in the RF module 2, so that the reference clock signals received by the two RF modules 20 remain consistent. The signal transmission lines experienced by the reference clock signal during the transmission process are basically the same, which ensures the consistency of the signal transmission lines, avoids the problem of unstable phase difference between the RF transmission channels of each RF module 20 caused by the reference clock signal being affected by different signal transmission lines, and improves the phase difference stability of the local oscillator signal generated by the RF module 2.

[0033] Optionally, the power distribution module 3 includes a plurality of power distributors 30 , and the number of the RF modules 20 is positively correlated with the number of the power distributors 30 .

[0034] In an optional embodiment, since the number of signal paths divided by the power divider 30 in the power distribution module 3 is limited, when the number of RF modules 20 exceeds the number of signal paths divided by a single power divider 30, an additional power divider 30 can be added to the power distribution module 3 to provide reference clock signals for the extra RF modules 20, that is, the number of power dividers 30 increases with the increase in the number of RF modules 20. For example, the power divider 30 selects a one-to-three power divider, and the number of RF modules 20 is 15. At this time, it can be seen that a single power divider 30 cannot provide reference clock signals for 15 RF modules 20. At this time, 4 power dividers 30 need to be added, and 15 reference clock signals are output through 5 power dividers 30, thereby realizing the provision of reference clock signals for 15 RF modules 20, meeting the normal operation of the 15 RF modules 20, and making the phase difference of the local oscillator signals generated by the 15 RF modules 20 stable.

[0035] In an optional embodiment, if Figure 3 As shown, the output end of the power distributor 30 is electrically connected to the input end of the RF module 20 through a RF cable, and a signal shielding layer is provided on the RF cable. By setting the signal shielding layer, the signal interference between the RF cables is reduced, that is, the reference clock signal is prevented from being significantly interfered with, thereby improving the phase difference stability of the local oscillator signal generated by the RF module 2.

[0036] In an optional embodiment, if Figure 4 As shown, the power distribution module 3 also includes a power amplifier 31, and the output end of the power amplifier 31 is electrically connected to the input end of the power distributor 30, and the input end of the power amplifier 31 is electrically connected to the output end of the clock source 1. Specifically, an amplifier is generally not required in the power distribution module 3, but when the user selects a multi-way power distributor such as a one-to-six power distributor and a one-to-eight power distributor, it will cause the loss of the reference clock signal. Therefore, the loss of the reference clock signal can be compensated by adding an external power amplifier 31 to ensure that the reference clock signal entering each RF module meets the requirements, thereby ensuring that the phase difference of the local oscillator signal generated by the RF module 2 is stable.

[0037] Optionally, the distance between the output end of the power divider 30 and the input ends of the plurality of RF modules 20 is within a first preset distance range.

[0038] In an optional embodiment, since a long RF cable will also affect the loss of the reference clock signal, when the distance between the output end of the power distribution module 3 and the input end of the multiple RF modules 20 is not within the first preset distance range, the power distributor 30 can be arranged at a position adjacent to the RF module 20 at a distance exceeding the first preset distance range by adding an external power distributor 30, thereby reducing the loss of the reference clock signal caused by the excessive length of the RF cable and improving the phase difference stability of the local oscillator signal generated by the RF module 2. Furthermore, the first preset distance range can be understood as the length range of the RF cable connecting the output end of the power distribution module 3 and the input end of the multiple RF modules 20. Exemplarily, the first preset distance range can be 150-200mm, but in actual applications, the first preset distance range can be appropriately adjusted according to specific needs, and there is no limitation here.

[0039] In an optional embodiment, the power distributor 30 adopts a passive power distributor, so that the power distributor 30 works stably, has a simple structure and does not require additional power supply, and is easy to use.

[0040] In an optional embodiment, the multiple RF modules 20 are not connected to each other and operate independently, thereby avoiding significant interference between the RF modules 20 during operation and improving the phase difference stability of the local oscillator signal generated by the RF module 2.

[0041] Optionally, the radio frequency module and the power distribution module are arranged in a accommodating space 4 formed by a thermal insulation material, wherein the thermal insulation material includes polytetrafluoroethylene.

[0042] In an optional embodiment, if Figure 5 As shown, the RF module 2 and the power distribution module 3 are arranged in a accommodating space 4 formed by the thermal insulation material to reduce the influence of the external ambient temperature on the RF module 2, the power distribution module 3 and the RF cable, thereby avoiding the reference clock signal from being affected by the external temperature during the transmission process and improving the phase difference stability of the local oscillator signal generated by the RF module 2. The selection of thermal insulation material is not limited to polytetrafluoroethylene, but can also be other materials that can achieve thermal insulation effect, which is not limited here.

[0043] In an optional embodiment, the power distribution module 3 can also be arranged outside the accommodating space 4 formed by the thermal insulation material, but it is necessary to ensure that the RF cable between the output end of the power distribution module 3 and the RF module 2 is as short as possible to reduce the impact of the external ambient temperature on the reference clock signal passing through the RF cable and improve the phase difference stability of the local oscillator signal generated by the RF module.

[0044] In an optional embodiment, the clock frequency of the reference clock signal may be selected to be 100 MHz, or the clock frequency of the reference clock signal may be adjusted according to specific requirements to meet the control of subsequent quantum bits.

[0045] The present application divides the reference clock signal provided by the clock source into multiple reference clock signals by setting a power distribution module outside the RF module, and outputs the reference clock signal through multiple output ports of the power distribution module, so that the reference clock signals received by multiple RF modules in the RF module remain consistent. At the same time, since multiple RF modules work independently, the reference clock signal is guaranteed to take the same path in the RF module, thereby improving the phase difference stability of the local oscillator signal generated by the RF module.

[0046] Based on the same inventive concept, this embodiment also proposes a quantum computing measurement and control system, including a RF module system described in any one of the above-mentioned feature descriptions, wherein the RF module is enabled to generate a local oscillator signal with a stable phase difference through the RF module system, and the RF module outputs a RF signal based on the local oscillator signal.

[0047] Based on the same inventive concept, this embodiment also provides a quantum computer, which includes a quantum chip and the quantum computing measurement and control system as described above, wherein the quantum computing measurement and control system is connected to the quantum chip via a signal transmission line; wherein a plurality of quantum bits are arranged on the quantum chip, and the quantum computing measurement and control system enables the radio frequency module to output a radio frequency signal with a stable phase difference through the radio frequency module system, and inputs the signal to the corresponding quantum bit through the signal transmission line, and the quantum bit performs quantum calculations based on the radio frequency signal output by the quantum computing measurement and control system.

[0048] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "example" or "specific example" etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example 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. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or more embodiments in a suitable manner. In addition, those skilled in the art may combine and combine different embodiments or examples described in this specification.

[0049] The above are only preferred embodiments of the present application and do not have any limiting effect on the present application. Any technical personnel in the relevant technical field, without departing from the scope of the technical solution of the present application, may make any form of equivalent replacement or modification to the technical solution and technical content disclosed in the present application, which shall be deemed as the content of the technical solution of the present application and still fall within the protection scope of the present application.

Claims

1. A radio frequency module system, characterized in that: include: A clock source, used to provide a reference clock signal; A power distribution module, the input end of which is electrically connected to the output end of the clock source, and is used to divide the reference clock signal into multiple reference clock signals and output them respectively through multiple output ports; The radio frequency module includes a plurality of radio frequency modules, each of which is used to receive a reference clock signal and generate a local oscillator signal with a stable phase difference based on the reference clock signal.

2. The system according to claim 1, characterized in that The power distribution module includes a plurality of power distributors, and the number of the radio frequency modules is positively correlated with the number of the power distributors.

3. The system according to claim 2, characterized in that The output end of the power distributor is electrically connected to the input end of the radio frequency module through a radio frequency cable, and a signal shielding layer is provided on the radio frequency cable.

4. The system according to claim 2, characterized in that The power distribution module further includes a power amplifier, an output end of the power amplifier is electrically connected to an input end of the power distributor, and an input end of the power amplifier is electrically connected to an output end of the clock source.

5. The system according to claim 2, characterized in that The distance between the output end of the power divider and the input ends of the plurality of radio frequency modules is within a first preset distance range.

6. The system according to claim 2, characterized in that The power divider is a passive power divider.

7. The system according to claim 1, characterized in that The radio frequency module and the power distribution module are arranged in a containing space formed by the thermal insulation material.

8. The system according to claim 7, characterized in that The thermal insulation material comprises polytetrafluoroethylene.

9. A quantum computing measurement and control system, characterized in that: It comprises the RF module system as described in any one of claims 1 to 8, wherein the RF module is enabled to generate a local oscillator signal with a stable phase difference through the RF module system, and the RF module outputs a RF signal based on the local oscillator signal.

10. A quantum computer, characterized in that: It includes the quantum computing measurement and control system and quantum chip as described in claim 9, and the quantum chip performs quantum calculations based on the radio frequency signal output by the quantum computing measurement and control system.

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