Chang-Yong Chen and Ke-Lin Gao 2006 J. Phys. A: Math. Gen. 39 2435 doi:10.1088/0305-4470/39/10/012
Approximate unconventional geometric phase gate by highly squeezed operators with a cavity QED system
Chang-Yong Chen1,2,3 and Ke-Lin Gao2,3
Show affiliationsWe introduce the general definition of the unconventional geometric phase independent of the specific physical system and show how a highly squeezed operator can approximately induce the general unconventional geometric phase, which goes beyond the original unconventional one by displacement operators (Zhu and Wang 2003 Phys. Rev. Lett. 91 187902). By means of the squeezed operator concerning the cavity mode state along a closed path in the phase space, we discuss specifically how to implement approximately a two-qubit geometric phase gate in a cavity QED system with two-photon interaction between the atoms and the cavity mode, assisted by a classical field. Discussions regarding the implementation time of the gating, the possible decaying sources and the experimental feasibility are given in detail.
- PACS
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03.67.Lx Quantum computation architectures and implementations
- MSC
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81S30 Phase space methods including Wigner distributions, etc.
81P68 Quantum computation and quantum cryptography (See also 68Q05, 94A60)
- Subjects
- Dates
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Issue 10 (10 March 2006)
Received 28 November 2005, in final form 27 January 2006
Published 22 February 2006
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Approximate unconventional geometric phase gate by highly squeezed operators with a cavity QED system
Chang-Yong Chen and Ke-Lin Gao 2006 J. Phys. A: Math. Gen. 39 2435
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