A circuit for realizing two-qubit gate operation

Abstract

A circuit for realizing double-qubit gate operation, comprising: a plurality of superconducting qubits; a qubit coupling circuit corresponding to each superconducting qubit one-to-one; each qubit coupling circuit comprises: a coplanar superconducting microwave for reading The resonant cavity is in a detuned state with the corresponding superconducting qubit, and its eigenfrequency moves according to the state of the superconducting qubit; the metal electrode is used to connect the external circuit; the first, second, and third coupling ports are respectively used for The corresponding superconducting qubits are: coupled to the coplanar superconducting microwave resonator for reading, coupled to the coplanar microwave transmission line, and coupled to the coplanar superconducting microwave resonator transfer bridge; the microwave transmission line is used to transmit the corresponding The microwave pulse signal on the superconducting qubit of ; the microwave pulse signal can be adjusted to perform single-bit quantum logic gate operation on the corresponding superconducting qubit. The embodiment of the present invention realizes the adjustable controlled phase quantum logic gate operation.

Description

technical field [0001] This article refers to, but is not limited to, quantum computer technology, especially a circuit that implements the operation of a two-qubit gate. Background technique [0002] A quantum computer is a device that performs general computing based on quantum logic circuits. Compared with computers in related technologies, quantum computers may require a significant reduction in computing time to solve some specific problems, which has attracted widespread attention. Quantum chips based on superconducting materials can use semiconductor technology to achieve large-scale integration. Superconducting qubits have demonstrated better performance than other physical systems in the key indicators required for quantum computing, such as quantum state preparation, selective manipulation, and error correction. For its superior performance, it is one of the most promising platforms for realizing quantum computers. [0003] Based on the relevant theory, the proce...

AI Technical Summary

Problems solved by technology

The above limitations make the structure of the superconducting quantum chip complex and the fidelity is affected. The position and configuration of the superconducting qubits that can be coupled with each other are completely fixed by hardware micromachining and cannot be adjusted.

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