Universal Quantum Cloning Machine in Circuit Quantum Electrodynamics

• Published in: Chinese physics letters Vol. 27; no. 2; pp. 12 - 15
• Main Author: 吕丹丹 路洪 於亚飞 冯勋立 张智明
• Format: Journal Article
• Language: English
• Published: IOP Publishing 01.02.2010
• Subjects: Circuits; Cloning; Gates (circuits); Holes; Quantum electrodynamics; Qubits (quantum computing); SQUID; SQUIDs; Superconducting quantum interference devices; 实验实现; 电路; 超导量子干涉仪; 通用; 量子克隆; 量子比特; 量子电动力学
• ISSN: 0256-307X; 1741-3540; 1741-3540
• DOI: 10.1088/0256-307X/27/2/020302

We propose a scheme for realizing the 1 → 2 universal quantum cloning machine （UQCM） with superconducting quantum interference device （SQUID） qubits in circuit quantum electrodynamics （circuit QED）. In this scheme, in order to implement UQCM, we only need phase shift gate operation on SQUID qubits and the Raman transitions. The cavity number we need is only one. Thus our scheme is simple and has advantages in the experimental realization. Furthermore, both the cavity and the SQUID qubits are virtually excited, so the decoherence can be neglected.