Generation of nonclassical photon pairs for scalable quantum communication with atomic ensembles

Kuzmich, A., Bowen, W. P., Boozer, A. D., Boca, A., Chou, C. W., Duan, L.-M. and Kimble, H. J. (2003) Generation of nonclassical photon pairs for scalable quantum communication with atomic ensembles. Nature, 423 6941: 731-733. doi:10.1038/nature01714


Author Kuzmich, A.
Bowen, W. P.
Boozer, A. D.
Boca, A.
Chou, C. W.
Duan, L.-M.
Kimble, H. J.
Title Generation of nonclassical photon pairs for scalable quantum communication with atomic ensembles
Journal name Nature   Check publisher's open access policy
ISSN 0028-0836
1476-4687
Publication date 2003-06-12
Sub-type Article (original research)
DOI 10.1038/nature01714
Volume 423
Issue 6941
Start page 731
End page 733
Total pages 3
Place of publication London, England
Publisher Nature Publishing Group
Language eng
Subject 240402 Quantum Optics and Lasers
240499 Optical Physics not elsewhere classified
Abstract Quantum information science attempts to exploit capabilities from the quantum realm to accomplish tasks that are otherwise impossible in the classical domain1. Although sufficient conditions have been formulated for the physical resources required to achieve quantum computation and communication2, there is a growing understanding of the power of quantum measurement combined with the conditional evolution of quantum states for accomplishing diverse tasks in quantum information science3, 4, 5. For example, a protocol has recently been developed6 for the realization of scalable long-distance quantum communication and the distribution of entanglement over quantum networks. Here we report the first enabling step in the realization of this protocol, namely the observation of quantum correlations for photon pairs generated in the collective emission from an atomic ensemble. The nonclassical character of the fields is demonstrated by the violation of an inequality involving their normalized correlation functions. Compared to previous investigations of non-classical correlations for photon pairs produced in atomic cascades7 and in parametric down-conversion8, our experiment is distinct in that the correlated photons are separated by a programmable time interval (of about 400 nanoseconds in our initial experiments).
Q-Index Code C1
Q-Index Status Provisional Code
Institutional Status Unknown

Document type: Journal Article
Sub-type: Article (original research)
Collections: Excellence in Research Australia (ERA) - Collection
School of Physical Sciences Publications
 
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Created: Mon, 04 Aug 2008, 21:43:22 EST by Laura McTaggart on behalf of School of Mathematics & Physics