Quantum controlled phase gate and cluster states generation via two superconducting quantum interference devices in a cavity
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
Revised: 6 July 2006
Published online: 31 July 2006
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.
PACS: 03.67.Lx – Quantum computation / 03.65.Ud – Entanglement and quantum nonlocality / 42.50.Dv – Nonclassical states of the electromagnetic field, including entangled photon states; quantum state engineering and measurements
© EDP Sciences, Società Italiana di Fisica, Springer-Verlag, 2006