Issue
EPL
Volume 87, Number 5, September 2009
Article Number 50005
Number of page(s) 5
Section General
DOI http://dx.doi.org/10.1209/0295-5075/87/50005
Published online 24 September 2009
EPL, 87 (2009) 50005
DOI: 10.1209/0295-5075/87/50005

Quantum gate operations using atomic qubits through cavity input-output process

J. Song1, Y. Xia2 and H.-S. Song1

1   School of Physics and Optoelectronic Technology, Dalian University of Technology - Dalian 116024, China
2   Department of Physics, Fuzhou University - Fuzhou 350002, China

jiesong2002@gmail.com
hssong@dlut.edu.cn

received 9 July 2009; accepted in final form 26 August 2009; published September 2009
published online 24 September 2009

Abstract
We propose two deterministic schemes to implement quantum swap gate and Fredkin gate encoded by atomic qubits through the input-output process of the cavity. We show that these schemes can be extended to realize multi-qubit gate operations. By numerical calculation, the fidelity and photon loss probability for implementing quantum swap gate between photon and atom are also discussed.

PACS
03.67.Hk - Quantum communication.
03.65.Ud - Entanglement and quantum nonlocality (e.g. EPR paradox, Bell's inequalities, GHZ states, etc.).

© EPLA 2009