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Phys. Rev. Lett. 96, 010503 (2006) [4 pages]

Distributed Quantum Computation via Optical Fibers

Alessio Serafini,1 Stefano Mancini,2 and Sougato Bose1
1Department of Physics & Astronomy, University College London, Gower Street, London WC1E 6BT, United Kingdom
2INFM and Dipartimento di Fisica, Università di Camerino, I-62032 Camerino, Italy

Received 20 July 2005; published 5 January 2006

We investigate the possibility of realizing effective quantum gates between two atoms in distant cavities coupled by an optical fiber. We show that highly reliable swap and entangling gates are achievable. We exactly study the stability of these gates in the presence of imperfections in coupling strengths and interaction times and prove them to be robust. Moreover, we analyze the effect of spontaneous emission and losses and show that such gates are very promising in view of the high level of coherent control currently achievable in optical cavities.

©2006 The American Physical Society

URL: http://link.aps.org/doi/10.1103/PhysRevLett.96.010503
DOI: 10.1103/PhysRevLett.96.010503
PACS: 03.67.Lx; 03.67.Mn; 42.81.Qb
  • 03.67.Lx
    Quantum computation
  • 03.67.Mn
    Quantum entanglement production, characterization, and manipulation
  • 42.81.Qb
    Fiber waveguides, couplers, and arrays
  • YEAR: 2006
KEYWORDS: optical fibres, quantum gates, spontaneous emission, optical resonators, optical computing

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