Three-qubit quantum-gate operation with an SQUID in a cavity

doi:10.1088/1674-1056/21/6/064205

Abstract We propose a method of realizing a three-qubit quantum gate with a superconducting quantum interference device (SQUID) in a cavity. In this proposal, the gate operation involves the SQUID ground-states and the Fock states of cavity modes b and ĉ. The two field-modes act as the controlling qubits, and the two SQUID states form the target qubit. Since only the metastable lower levels are involved in the gate operation, the gate is not affected by the SQUID decay rates.

Keywords: SQUID quantum gate C²-Phase gate C²-Not gate

Received: 14 October 2011
Revised: 25 November 2011
Accepted manuscript online:

PACS:	42.50.-p	(Quantum optics)
	42.50.Ct	(Quantum description of interaction of light and matter; related experiments)
	03.67.-a	(Quantum information)
	03.67.Lx	(Quantum computation architectures and implementations)

Fund: Project supported by the National Natural Science Foundation of China (Grant No. 60978009), the Major Research Plan of the National Natural Science Foundation of China (Grant No. 91121023), and the National Basic Research Program of China (Grant No. 2011CBA00200).

Corresponding Authors: Zhang Zhi-Ming
E-mail: zmzhang@scnu.edu.cn

Cite this article:

Shi Hui-Min(石惠敏), Yu Ya-Fei(於亚飞), and Zhang Zhi-Ming(张智明) Three-qubit quantum-gate operation with an SQUID in a cavity 2012 Chin. Phys. B 21 064205

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