A circuit implementing dual quantum bit gate operation

Abstract

A circuit for implementing dual quantum bit gate operation includes: a plurality of superconducting quantum bits; quantum bit coupling circuits which are in one-to-one correspondence with the superconducting quantum bits; each quantum bit coupling circuit comprises a coplanar superconducting microwave resonant cavity for reading, the coplanar superconducting microwave resonant cavity and the corresponding superconducting quantum bit are in a detuned state, and the intrinsic frequency of the coplanar superconducting microwave resonant cavity moves according to the state of the superconducting quantum bit; the metal electrode is used for connecting an external circuit; the first coupling port, the second coupling port and the third coupling port are respectively used for coupling corresponding superconducting quantum bits to the coplanar superconducting microwave resonant cavity for reading, to the coplanar microwave transmission line and to the coplanar superconducting microwave resonant cavity transfer bridge; microwave transmission lines which are used for transmitting microwave pulse signals applied to the corresponding superconducting quantum bits; the microwave pulse signals can be adjusted to perform single-bit quantum logic gate operation on the corresponding superconducting quantum bits. According to the embodiment of the invention, adjustable controlled phase quantum logic gate operation is realized.

Description

Technical field [0001] This article relates to, but is not limited to, quantum computer technology, especially a circuit that realizes double-qubit gate operation. Background technique [0002] A quantum computer is a device that performs general calculations based on quantum logic circuits. Compared with computers in related technologies, the computing time required by quantum computers to solve some specific problems may be greatly reduced, and thus has attracted widespread attention. Quantum chips based on superconducting materials can use semiconductor technology to achieve large-scale integration. Superconducting qubits show better performance than other physical systems in terms of quantum state preparation, selective operation, and error correction. For its superior performance, it is one of the most promising platforms for realizing quantum computers. [0003] Based on related theories, the process of quantum computing is a process of performing various quantum logic gate...

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.

Images