Unconventional geometric quantum computation in a two-mode cavity

Journal Article · Wed Aug 15 04:00:00 EDT 2007 · Physical Review. A

DOI:https://doi.org/10.1103/PHYSREVA.76.024302· OSTI ID:21016062

Chunfeng, Wu ^[1]; Zisheng, Wang; Xunli, Feng; Lai, C H; Oh, C H ^[1]; Goan, H -S ^[2]; Kwek, L C ^[1]

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1. Department of Physics, National University of Singapore, 2 Science Drive 3, Singapore 117542 (Singapore)
2. Department of Physics and Center for Theoretical Sciences, National Taiwan University and National Center for Theoretical Sciences, Taipei 10617, Taiwan (China)

We propose a scheme for implementing unconventional geometric quantum computation by using the interaction of two atoms with a two-mode cavity field. The evolution of the system results in a nontrivial two-qubit phase gate. The operation of the proposed gate involves only metastable states of the atom and hence is not affected by spontaneous emission. The effect of cavity decay on the gate is investigated. It is shown that the evolution time of the gate in the two-mode case is less than that in the single-mode case proposed by Feng et al. [Phys. Rev. A 75, 052312 (2007)]. Thus the gate can be more decay tolerant than the previous one. The scheme can also be generalized to a system consisting of two atoms interacting with an N-mode cavity field.

• OSTI ID: 21016062
• Journal Information: Physical Review. A, Journal Name: Physical Review. A Journal Issue: 2 Vol. 76; ISSN 1050-2947; ISSN PLRAAN
• Country of Publication: United States
• Language: English

Related Subjects

71 CLASSICAL AND QUANTUM MECHANICS
GENERAL PHYSICS
ATOMS
INTERACTIONS
METASTABLE STATES
QUANTUM COMPUTERS
QUANTUM INFORMATION
QUANTUM MECHANICS
QUBITS