Unconventional geometric phase gates using two four-level rf-SQUIDs with cyclic population transfer in a cavity

We propose a scheme for realizing two-qubit quantum phase gates via an unconventional geometric phase shift using two four-level superconducting artificial atoms with cyclic population transfer (broken symmetry) in a cavity. In this scheme, the logical gates' operation only involves the metasta...

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Bibliographic Details
Published in:Journal of modern optics 2009-05, Vol.56 (9), p.1053-1059
Main Authors: Xia, Li-Xin, Xiong, Guo-Xin, Xie, Qiong-Tao
Format: Article
Language:English
Subjects:
artificial atom
Atoms & subatomic particles
Classical and quantum physics: mechanics and fields
Exact sciences and technology
Fundamental areas of phenomenology (including applications)
Geometry
Optics
Physics
Quantum information
Quantum optics
quantum phase gate
Quantum theory
Superconductors
unconventional geometric phase
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Summary:We propose a scheme for realizing two-qubit quantum phase gates via an unconventional geometric phase shift using two four-level superconducting artificial atoms with cyclic population transfer (broken symmetry) in a cavity. In this scheme, the logical gates' operation only involves the metastable states of each artificial atom. Moreover, under certain conditions, the atoms are disentangled with the cavity mode. Thus, the gate is insensitive to both the atomic spontaneous emission and the cavity decay.
ISSN:0950-0340
1362-3044
DOI:10.1080/09500340902912928