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Superconducting circuit structure, superconducting quantum chip and superconducting quantum computer

A quantum computer and circuit structure technology, applied in quantum computers, superconducting devices, circuits, etc., can solve problems such as limiting the fidelity of qubit gates and affecting the performance of qubits, and achieve simple and high-fidelity derivation and solution processes The effect of speed and quick manipulation

Active Publication Date: 2020-01-31
BEIJING BAIDU NETCOM SCI & TECH CO LTD
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  • Abstract
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  • Application Information

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Problems solved by technology

Obviously, this σ z σ z Parasitic coupling not only directly affects qubit performance, but also limits the fidelity of two-qubit gates

Method used

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  • Superconducting circuit structure, superconducting quantum chip and superconducting quantum computer
  • Superconducting circuit structure, superconducting quantum chip and superconducting quantum computer
  • Superconducting circuit structure, superconducting quantum chip and superconducting quantum computer

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Embodiment Construction

[0041] Exemplary embodiments of the present application are described below in conjunction with the accompanying drawings, which include various details of the embodiments of the present application to facilitate understanding, and they should be regarded as exemplary only. Accordingly, those of ordinary skill in the art will recognize that various changes and modifications of the embodiments described herein can be made without departing from the scope and spirit of the application. Also, descriptions of well-known functions and constructions are omitted in the following description for clarity and conciseness.

[0042] In actual research, in order to eliminate the σ between qubits z σ z Parasitic coupling, a coupling device (coupler) can be introduced between two qubits, the coupling device can be a qubit with adjustable frequency, and the coupling between the coupling device and the qubit is a transverse field (transversal), also That is, transverse field coupling, the co...

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Abstract

The invention discloses a superconducting circuit structure, a superconducting quantum chip and a superconducting quantum computer, and relates to the field of quantum computing. The superconducting circuit structure comprises the components of: at least two quantum bits; a connecting assembly which is respectively coupled with the two quantum bits and is used for realizing transverse field coupling between the connecting assembly and the two quantum bits; and a coupling device which is respectively coupled with the two quantum bits and is used for realizing longitudinal field coupling betweenthe coupling device and the two quantum bits. Therefore, sigma z sigma z parasitic coupling between the quantum bits is efficiently eliminated, and two quantum bit gates with high fidelity are realized.

Description

technical field [0001] This application relates to the field of computers, in particular to the field of quantum computing. Background technique [0002] Achieving high-fidelity two-qubit gates is critical on the path to universal quantum computing. However, as the number of qubits continues to increase, new noise channels and various crosstalks (including but not limited to crosstalk between qubits, and inevitable parasitic coupling between qubits, etc.), make it possible to achieve high-fidelity two-qubit The door becomes a huge challenge. When two qubits are connected, in addition to generating the σ used to realize the quantum logic gate x σ x Coupling, that is, using σ x σ x Coupling allows the quantum states of two qubits to be exchanged, and inevitably produces an additional σ z σ z Parasitic coupling, where a change in the quantum state of one qubit affects another qubit. Obviously, this σ z σ z Parasitic coupling not only directly affects qubit performance...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06N10/00H10N69/00
CPCG06N10/00H10N69/00H10N60/12
Inventor 晋力京段润尧
Owner BEIJING BAIDU NETCOM SCI & TECH CO LTD
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