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Robust quantum gates on neutral atoms with cavity-assisted photon scattering

Duan, L.-M. and Wang, B. and Kimble, H. J. (2005) Robust quantum gates on neutral atoms with cavity-assisted photon scattering. Physical Review A, 72 (3). Art. No. 032333. ISSN 1050-2947. http://resolver.caltech.edu/CaltechAUTHORS:DUApra05

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Abstract

We propose a scheme to achieve quantum computation with neutral atoms whose interactions are catalyzed by single photons. Conditional quantum gates, including an N-atom Toffoli gate and nonlocal gates on remote atoms, are obtained through cavity-assisted photon scattering in a manner that is robust to random variation in the atom-photon coupling rate and which does not require localization in the Lamb-Dicke regime. The dominant noise in our scheme is automatically detected for each gate operation, leading to signalled errors which do not preclude efficient quantum computation even if the error probability is close to the unity.


Item Type:Article
Additional Information:©2005 The American Physical Society (Received 6 July 2005; published 28 September 2005) technology. Note added. After submission of this work, we were informed that a similar idea was also investigated by the authors X.-M. Lin et al. (unpublished). We gratefully acknowledge the contributions of W. D. Phillips, whose question stimulated these investigations. We thank also S. Lloyd for helpful discussions. This work was supported by the National Science Foundation (Grant Nos. 0431476, EIA-0086038, and PHY-0140355), the Advanced Research and Development Activity under ARO contracts, the A. P. Sloan foundation (L.M.D.), and the Caltech MURI Center for Quantum Networks (H.J.K.).
Subject Keywords:quantum gates; atom-photon collisions; quantum optics; quantum noise; information theory; error statistics; random processes
Record Number:CaltechAUTHORS:DUApra05
Persistent URL:http://resolver.caltech.edu/CaltechAUTHORS:DUApra05
Alternative URL:http://dx.doi.org/10.1103/PhysRevA.72.032333
Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:2176
Collection:CaltechAUTHORS
Deposited By: Archive Administrator
Deposited On:13 Mar 2006
Last Modified:26 Dec 2012 08:47

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