Quantum computation without strict strong coupling on a silicon chip

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Yun-Feng Xiao, Zheng-Fu Han, and Guang-Can Guo
Key Laboratory of Quantum Information, University of Science and Technology of China, Hefei 230026, People's Republic of China

Received 19 September 2005; published 31 May 2006

Wepropose a potential quantum-computer hardware-architecture model on a silicon chipin which the basic cell gate is the atom-photon controlled-phase-flipgate. This gate can be implemented through a single-photon pulse'sscattering by a toroidal microcavity trapping a neutral atom, andit does not require very strict strong-coupling regime and canwork beyond the Lamb-Dicke limit with high fidelity and successprobability under practical noise environments. Especially, good and bad lossesof the toroidal cavity are discussed in detail. Finally, apossibly simple experiment based on current experimental technology is proposedto demonstrate our scheme.

URL:	http://link.aps.org/doi/10.1103/PhysRevA.73.052324
DOI:	10.1103/PhysRevA.73.052324
PACS:	03.67.Lx; 42.50.Pq; 42.60.Da; 42.82.Et 03.67.Lx Quantum computation 42.50.Pq Cavity quantum electrodynamics; micromasers 42.60.Da Laser resonators, cavities, amplifiers, arrays, and rings 42.82.Et Optical waveguides, couplers, and arrays (integrated optics) YEAR: 2006
KEYWORDS:	quantum gates, quantum optics, quantum noise, probability, information theory

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Phys. Rev. A 73, 052324 (2006) [6 pages]

Quantum computation without strict strong coupling on a silicon chip

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A new free weekly publication from APS