Eur. Phys. J. B 52, 333-336 (2006)
https://doi.org/10.1140/epjb/e2006-00297-3

Quantum controlled phase gate and cluster states generation via two superconducting quantum interference devices in a cavity

¹ School of Physics & Material Science, Anhui University, Hefei, 230039, P.R. China
² Department of Mathematics & Physics, West Anhui University, Lu'an, 237012, P.R. China

Corresponding authors: ^a xuezhengyuan@yahoo.com.cn - ^b zlcao@ahu.edu.cn

Received: 25 April 2006
Revised: 6 July 2006
Published online: 31 July 2006

Abstract

A scheme for implementing 2-qubit quantum controlled phase gate (QCPG) is proposed with two superconducting quantum interference devices (SQUIDs) in a cavity. The gate operations are realized within the two lower flux states of the SQUIDs by using a quantized cavity field and classical microwave pulses. Our scheme is achieved without any type of measurement, does not use the cavity mode as the data bus and only requires a very short resonant interaction of the SQUID-cavity system. As an application of the QCPG operation, we also propose a scheme for generating the cluster states of many SQUIDs.