Quantum parametric amplifier pumping device and system

Abstract

This application proposes a quantum parametric amplifier pumping device and system, relating to the field of quantum computing. The proposed quantum parametric amplifier pumping device includes a DC module configured to generate a DC signal; a radio frequency (RF) module configured to generate an RF signal; a control module electrically connected to the DC and RF modules, configured to receive instructions from a host computer and control the DC and RF modules; and a synthesis module electrically connected to the DC and RF modules, configured to synthesize the DC and RF signals. This application also proposes a quantum parametric amplifier pumping system including the aforementioned multiple pumping devices, wherein the clock signal for each pumping device in the pumping system is the same signal; and the trigger signal for each pumping device is the same signal. This application solves the problem that the instrument used to output the pump signal is large in size, which is not conducive to working with other quantum devices.

Description

Technical Field

[0001] This application relates to the field of quantum computing, and more particularly to quantum parametric amplifier pumping devices and systems. Background Technology

[0002] The quantum parametric amplifier (QPA), as the first-stage amplifier for signal readout in a quantum chip, is a key component of the entire quantum link. The QPA effectively amplifies quantum signals, providing sufficiently high readout fidelity and signal-to-noise ratio, thereby significantly improving signal readout efficiency. The QPA requires a pump source to provide the necessary DC and RF signals. The DC signal provides the bias voltage, allowing it to operate in the nonlinear region for better amplification. The RF signal provides the pump energy. Current QPAs use dedicated instruments to output DC bias and RF signals as pump signals. This approach results in bulky instruments and is not conducive to integration with other quantum control devices. Utility Model Content

[0003] To address the technical problems existing in the prior art, this application proposes a quantum parametric amplifier pumping device, characterized by comprising: a DC module configured to generate a DC signal required by the quantum parametric amplifier; a radio frequency (RF) module configured to generate an RF signal required by the quantum parametric amplifier; a control module electrically connected to the DC module and the RF module, configured to receive instructions from a host computer and control the DC module and the RF module; and a synthesis module electrically connected to the DC module and the RF module, configured to synthesize the DC signal and the RF signal.

[0004] In particular, the quantum parametric amplifier pumping device proposed in this application is characterized in that the DC module, the radio frequency module and the control module all include a clock section and are configured to receive the same clock signal.

[0005] In particular, the quantum parametric amplifier pumping device proposed in this application is characterized in that the DC module, the radio frequency module and the control module all include a triggering part, configured to receive the same triggering signal.

[0006] In particular, the quantum parametric amplifier pumping device proposed in this application is characterized in that the DC module and the RF module include an execution part, which is electrically connected to the control module through a high-speed interface, receives commands from the control module, and executes operations according to the commands.

[0007] In particular, the quantum parametric amplifier pumping device proposed in this application is characterized in that the execution part of the DC module, the execution part of the RF module, and the control module are implemented by FPGA.

[0008] In particular, the quantum parametric amplifier pumping device proposed in this application is characterized in that both the DC module and the RF module include an output section, the output section including a digital-to-analog converter and a filter, configured to convert and filter the digital signals generated by their respective execution sections.

[0009] In particular, the quantum parametric amplifier pumping device proposed in this application is characterized in that the control module includes a control section configured to provide respective control signals to the DC module and the radio frequency module according to the quantum control signal from the host computer.

[0010] In particular, the quantum parametric amplifier pumping device proposed in this application is characterized by further including a reference module electrically connected to the DC module and configured to provide a reference signal to the DC module.

[0011] Specifically, the quantum parametric amplifier pumping device proposed in this application is characterized in that the reference module includes: a temperature compensation submodule configured to compensate the reference voltage; a low-pass filter electrically connected to the temperature compensation submodule configured to filter noise; and a low-noise operational amplifier electrically connected to the low-pass filter configured to adjust the output voltage.

[0012] This application also proposes a pumping system, characterized in that it includes the above-mentioned multiple pumping devices, wherein the clock signal of each pumping device in the pumping system is the same signal; and the trigger signal of each pumping device in the pumping system is the same signal.

[0013] The quantum parametric amplifier pumping device and system proposed in this application integrate the DC signal emitted by the DC module and the RF signal emitted by the RF module into a single output through a synthesis module. Compared with existing methods that directly drive the output after instrumentation, the quantum parametric amplifier pumping device and system proposed in this application are smaller in size, which facilitates their integration with other quantum control devices. Attached Figure Description

[0014] Figure 1 This is a schematic diagram of a quantum parametric amplifier pumping device according to an embodiment of this application;

[0015] Figure 2 This is a schematic diagram of a DC module structure according to an embodiment of this application;

[0016] Figure 3 This is a schematic diagram of a radio frequency module structure according to an embodiment of this application;

[0017] Figure 4 This is a schematic diagram of the control module structure according to an embodiment of this application;

[0018] Figure 5 This is a schematic diagram of a baseline module structure according to an embodiment of this application. Detailed Implementation

[0019] To make the objectives, technical solutions, and advantages of the embodiments of this application clearer, the technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0020] In the following detailed description, reference can be made to the accompanying drawings, which form part of this application and illustrate specific embodiments of the present application. In the drawings, similar reference numerals describe substantially similar components in different figures. Specific embodiments of the present application are described in sufficient detail below to enable those skilled in the art to implement the technical solutions of the present application. It should be understood that other embodiments may also be utilized, or structural, logical, or electrical changes may be made to the embodiments of the present application.

[0021] Techniques, methods, and apparatus known to those skilled in the art may not be discussed in detail, but where appropriate, such techniques, methods, and apparatus should be considered part of the specification. The lines connecting the units in the accompanying drawings are merely for illustrative purposes, indicating that at least the units at both ends of the line are communicating with each other, and are not intended to prevent unconnected units from communicating. Furthermore, the number of lines between two units is intended to indicate at least the number of signals involved in communication between the two units or at least the number of output terminals, and is not intended to limit communication between the two units to only the signals shown in the figures.

[0022] Figure 1 This is a schematic diagram of a quantum parametric amplifier pumping device according to an embodiment of this application.

[0023] Figure 1 Taking a quantum parametric amplifier pumping device as an example, according to different embodiments, multiple quantum parametric amplifier pumping devices can work together to provide pump signals to multiple quantum parametric amplifiers.

[0024] According to one embodiment, the quantum parametric amplifier pumping device may include a DC module 101. The DC module 101 can output DC signals of different levels according to quantum control signals from a host computer, and can also output voltage signals according to a specific timing sequence based on input clock signals and trigger signals.

[0025] According to one embodiment, the quantum parametric amplifier pump device may further include a radio frequency (RF) module 102. The RF module 102 can output arbitrary waveforms of various timings, i.e., RF signals, based on the quantum control signal. The RF signal can be an RF signal of arbitrary waveform within the 10-20 GHz frequency band.

[0026] According to one embodiment, the quantum parametric amplifier pump device may further include a control module 103 electrically connected to the DC module 101 and the RF module 102. External control signals can be transmitted through the control module 103 to control the switching, timing, and output waveform of the DC module 101 and the RF module 102.

[0027] According to one embodiment, the quantum parametric amplifier pump device may further include a combining module 104 electrically connected to the DC module 101 and the RF module 102. The combining module 104 is capable of combining the DC signal output from the DC module and the RF signal output from the RF module into a single output.

[0028] According to another embodiment, the synthesis module 104 can also be disposed in the DC module 101 or the RF module 102 to save space.

[0029] According to one embodiment, the quantum parametric amplifier pump device may further include a reference module 105. The reference module 105 can provide a highly stable, low-drift, and low-noise reference signal to the DC module 101. According to one embodiment, the DC module 101 provides a bias voltage to the quantum parametric amplifier, and this bias voltage needs to be stable to ensure the performance of the quantum parametric amplifier; therefore, the reference module 105 is required to provide a reference signal to the DC module 101.

[0030] Figure 2 This is a schematic diagram of a DC module structure according to an embodiment of this application.

[0031] According to one embodiment, the DC module may include an execution section 201. According to one embodiment, the execution section 201 may be an FPGA or an MCU. According to one embodiment, the execution section 201 is electrically connected to a control module via its built-in high-speed interface, receives commands from the control module, and executes output operations according to the commands. It generates a DC signal based on the content of the DC module control signals.

[0032] According to one embodiment, the DC module may further include an output section 202. According to one embodiment, the output section 202 may include a digital-to-analog converter 2021 and a filter 2022. The digital-to-analog converter 2021 is configured to convert the digital signal generated by the execution section 201 into an analog signal to meet the needs of the quantum parametric amplifier. The filter 2022 is configured to filter out noise. The digital signal is converted by the digital-to-analog converter 2021 and then filtered by the filter 2022 to generate the output DC signal.

[0033] According to one embodiment, the DC module may include one or more output sections 202. Figure 2 The DC module shown, which includes an output section 202, represents only one case.

[0034] According to one embodiment, the DC module may further include a clock section 203. According to one embodiment, the clock signal of the DC module may be generated by the clock section of the DC module, the control module, or the RF module in the same device, and sent to other modules of the device for use. According to another embodiment, the clock signal of the DC module may also come from a host computer or from other pumping devices. When there are multiple pumping devices, it must be ensured that the clock signal of the DC module of each device is the same signal. The clock signal is configured to ensure overall synchronization consistency of the entire system.

[0035] According to one embodiment, the DC module may further include a trigger section 204. According to one embodiment, the trigger signal of the DC module may be generated by the trigger section of the DC module, the control module, or the RF module in the same device, and sent to other modules of the device for use. According to another embodiment, the trigger signal of the DC module may also come from a host computer or from other pumping devices. When there are multiple pumping devices, it must be ensured that the trigger signal of the DC module of each device is the same signal. The trigger signal is configured to control the entire system to operate synchronously at the same time. According to one embodiment, the DC module supports multiple output modes, including continuous output, pulse output, stepped wave output, etc.

[0036] Figure 3 This is a schematic diagram of a radio frequency module structure according to an embodiment of this application.

[0037] According to one embodiment, the radio frequency module may include an execution section 301. According to one embodiment, the execution section 301 may employ an FPGA or an RFSOC. According to one embodiment, the execution section 301 is electrically connected to the control module via its built-in high-speed interface, receives commands from the control module, and executes output operations according to the commands. According to one embodiment, the high-speed interface may be a network port, PCIe, etc.

[0038] According to one embodiment, the RF module may further include an output section 302. According to one embodiment, the output section 302 may include a digital-to-analog converter 3021 and a filter 3022. The digital-to-analog converter 3021 is configured to convert the digital signal generated by the execution section 301 into an analog signal to meet the needs of the quantum parametric amplifier. The filter 3022 is configured to limit bandwidth. The digital signal is converted by the digital-to-analog converter 3021 and then filtered by the filter 3022 to generate the output RF signal.

[0039] According to one embodiment, the radio frequency module may include one or more output sections 302. Figure 3 The RF module shown, which includes an output section 302, represents only one case.

[0040] According to one embodiment, the RF module may further include a clock section 303. According to one embodiment, the clock signal of the RF module may be generated by the clock section of the RF module, the control module, or the DC module in the same device, and sent to other modules of the device for use. According to another embodiment, the clock signal of the RF module may also come from a host computer or from other pumping devices. When there are multiple pumping devices, it must be ensured that the clock signal of the RF module of each device is the same signal. The clock signal is configured to ensure overall synchronization consistency of the entire system.

[0041] According to one embodiment, the RF module may further include a trigger section 304. According to one embodiment, the trigger signal of the RF module may be generated by the RF module itself, or by the trigger section of the control module or DC module within the same device, and sent to other modules of the device for use. According to another embodiment, the trigger signal of the RF module may also originate from a host computer, or from other pumping devices. When there are multiple pumping devices, it must be ensured that the trigger signal of the RF module of each device is the same signal. The trigger signal is configured to control the entire system to operate synchronously at the same time.

[0042] Figure 4 This is a schematic diagram of the control module structure according to an embodiment of this application.

[0043] According to one embodiment, the control module may include a clock section 403. The clock signal of the control module is the same signal as the clock signals of the DC module and the RF module. According to one embodiment, the clock signal of the control module may be generated by the clock section of the control module or the DC module or RF module in the same device and sent to other modules of the device for use. According to another embodiment, the clock signal of the control module may also come from a host computer or from other pumping devices. When there are multiple pumping devices, it must be ensured that the clock signal of the control module of each device is the same signal. The clock signal is configured to ensure that the synchronization of the entire system is generally consistent.

[0044] According to one embodiment, the control module may further include a trigger section 404. The trigger signal of the control module is the same signal as the trigger signals of the DC module and the RF module. According to one embodiment, the trigger signal of the control module may be generated by the trigger section of the control module or the DC module or RF module in the same device, and sent to other modules of the device for use. According to another embodiment, the trigger signal of the control module may also come from a host computer, or it may come from other pumping devices. When there are multiple pumping devices, it must be ensured that the trigger signal of the control module of each device is the same signal. The trigger signal is configured to control the entire system to operate synchronously at the same time.

[0045] According to one embodiment, the control module can send the content needed for the DC module and the RF module to generate DC signals and RF signals in advance to the two modules, and generate DC signals and RF signals after the trigger signal arrives.

[0046] According to one embodiment, the control module may further include a control section 401. The control section provides a DC module control signal to the DC module and an RF module control signal to the RF module based on the quantum control signal from the host computer.

[0047] According to one embodiment, the control module may further include an interface section 402. The interface section 402 provides the control module with high-speed interfaces such as Ethernet and PCIe. The host computer provides quantum control signals to the control section through the high-speed interface.

[0048] According to one embodiment, the control module can be implemented using an FPGA.

[0049] Figure 5 This is a schematic diagram of a baseline module structure according to an embodiment of this application.

[0050] According to one embodiment, the reference module may include a temperature compensation submodule 501 configured to compensate the reference voltage to reduce the impact of changes in ambient temperature.

[0051] According to one embodiment, the reference module may further include a low-pass filter 502, electrically connected to the temperature compensation submodule 501, configured to filter noise. Because the signal generated by the reference module is a DC signal with a frequency of 0, a low-pass filter is required.

[0052] According to one embodiment, the reference module may further include a low-noise operational amplifier 503 electrically connected to a low-pass filter 502, configured to adjust the output voltage to an appropriate value.

[0053] This application also proposes a quantum parametric amplifier pumping system, comprising multiple quantum parametric amplifier pumping devices as described above. The clock signal for each pumping device in the pumping system is the same signal, and the trigger signal for each pumping device in the pumping system is the same signal.

[0054] The quantum parametric amplifier pumping device and system proposed in this application integrate the DC signal emitted by the DC module and the RF signal emitted by the RF module into a single output through a synthesis module. Compared with existing methods that directly drive the output after instrumentation, the quantum parametric amplifier pumping device and system proposed in this application are smaller in size, which facilitates their integration with other quantum control devices.

Claims

1. A pumping device for a quantum parametric amplifier, characterized in that, include: A DC module configured to generate the DC signal required by the quantum parametric amplifier; The radio frequency module is configured to generate the radio frequency signals required by the quantum parametric amplifier. The control module is electrically connected to the DC module and the RF module, and is configured to receive instructions from the host computer and control the DC module and the RF module. A synthesis module, electrically connected to the DC module and the RF module, is configured to synthesize the DC signal and the RF signal.

2. The quantum parametric amplifier pumping device according to claim 1, characterized in that, The DC module, the RF module, and the control module all include a clock section and are configured to receive the same clock signal.

3. The quantum parametric amplifier pumping device according to claim 1, characterized in that, The DC module, the RF module, and the control module all include a triggering section and are configured to receive the same triggering signal.

4. The quantum parametric amplifier pumping device according to claim 1, characterized in that, The DC module and the RF module include an execution section, which is electrically connected to the control module via a high-speed interface, receives commands from the control module, and executes operations according to the commands.

5. The quantum parametric amplifier pumping device according to claim 4, characterized in that, The execution parts of the DC module and the RF module, as well as the control module, are implemented using an FPGA.

6. The quantum parametric amplifier pumping device according to claim 4, characterized in that, Both the DC module and the RF module include an output section, which includes a digital-to-analog converter and a filter, configured to convert and filter the digital signals generated by their respective execution sections.

7. The quantum parametric amplifier pumping device according to claim 1, characterized in that, The control module includes a control section configured to provide respective control signals to the DC module and the RF module based on quantum control signals from the host computer.

8. The quantum parametric amplifier pumping device according to claim 1, characterized in that, It also includes a reference module, electrically connected to the DC module, configured to provide a reference signal to the DC module.

9. The quantum parametric amplifier pumping device according to claim 8, characterized in that, The reference module includes: a temperature compensation submodule configured to compensate the reference voltage; a low-pass filter electrically connected to the temperature compensation submodule configured to filter noise; and a low-noise operational amplifier electrically connected to the low-pass filter configured to adjust the output voltage.

10. A quantum parametric amplifier pumping system, characterized in that, It includes multiple quantum parametric amplifier pumping devices as described in any one of claims 1-9, wherein the clock signal of each quantum parametric amplifier pumping device in the quantum parametric amplifier pumping system is the same signal; and the trigger signal of each quantum parametric amplifier pumping device in the quantum parametric amplifier pumping system is the same signal.

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