Issue
EPL
Volume 86, Number 3, May 2009
Article Number 30006
Number of page(s) 5
Section General
DOI http://dx.doi.org/10.1209/0295-5075/86/30006
Published online 22 May 2009
EPL, 86 (2009) 30006
DOI: 10.1209/0295-5075/86/30006

Heralded quantum memory for single-photon polarization qubits

G. W. Lin1, X. B. Zou1, X. M. Lin2 and G. C. Guo1

1   Key Laboratory of Quantum Information, Department of Physics, University of Science and Technology of China - Hefei 230026, PRC
2   School of Physics and Optoelectronics Technology, Fujian Normal University - Fuzhou 350007, PRC

xbz@ustc.edu.cn
xmlin@fjnu.edu.cn

received 21 January 2009; accepted in final form 20 April 2009; published May 2009
published online 22 May 2009

Abstract
We propose a scheme to implement a heralded quantum memory for single-photon polarization qubits with a single atom trapped in an optical cavity. In this scheme, an injected photon only exchanges quantum state with the atom, so that the heralded storage can be achieved by detecting the output photon. We also demonstrate that the scheme can be used for realizing the heralded quantum state transfer, exchange, and entanglement distribution between distant nodes. The ability to detect whether the operation has succeeded or not is crucial for practical application.

PACS
03.67.Hk - Quantum communication.
03.67.-a - Quantum information.
42.50.-p - Quantum optics.

© EPLA 2009