The n-Qubit W State of Ground-State Atoms Using Cavity QED and Single Photon Detection
PAN Chang-Ning1, ZHANG Jun-Xiang2, ZHAO Xue-Hui1
1School of Science, Hunan University of Technology, Zhuzhou 412008 2State Key Laboratory of Quantum Optics and Quantum Optics Devices, Institute of Opto-Electronics, Shanxi University, Taiyuan 030006
The n-Qubit W State of Ground-State Atoms Using Cavity QED and Single Photon Detection
PAN Chang-Ning1, ZHANG Jun-Xiang2, ZHAO Xue-Hui1
1School of Science, Hunan University of Technology, Zhuzhou 412008 2State Key Laboratory of Quantum Optics and Quantum Optics Devices, Institute of Opto-Electronics, Shanxi University, Taiyuan 030006
摘要We present a simple scheme for the probabilistic generation of the n-qubit W state of three-level systems in cavity quantum electrodynamics. Once the W state is prepared, it will be insensitive to the spontaneous emission of atoms due to the fact that only the two degenerate ground states of the three-level atoms are involved. With time evolution of the system, the success probability and the experimental feasibility are also discussed.
Abstract：We present a simple scheme for the probabilistic generation of the $n$-qubit W state of three-level systems in cavity quantum electrodynamics. Once the W state is prepared, it will be insensitive to the spontaneous emission of atoms due to the fact that only the two degenerate ground states of the three-level atoms are involved. With time evolution of the system, the success probability and the experimental feasibility are also discussed.
(Foundations of quantum mechanics; measurement theory)
引用本文:
PAN Chang-Ning;ZHANG Jun-Xiang;ZHAO Xue-Hui. The n-Qubit W State of Ground-State Atoms Using Cavity QED and Single Photon Detection[J]. 中国物理快报, 2010, 27(3): 30306-030306.
PAN Chang-Ning, ZHANG Jun-Xiang, ZHAO Xue-Hui. The n-Qubit W State of Ground-State Atoms Using Cavity QED and Single Photon Detection. Chin. Phys. Lett., 2010, 27(3): 30306-030306.
[1] Einstein A, Podolsky B and Rosen N 1935 Phys. Rev. 47 777 [2] Bennett C H and Wiesner S J 1992 Phys. Rev. Lett. 69 2881 [3] Tan J, Fang M F 2006 Chin. Phys. Lett. 23 283 [4] Zheng S B 2003 Chin. Phys. Lett. 20 325 [5] Zheng S B and Guo G C 2000 Phys. Rev. Lett. 85 2392 [6] Ekert A K 1991 Phys. Rev. Lett. 67 661 [7] Bouwmeester D, Pan J W, Daniell M, Weinfurfer H and Zeilinger A 1999 Phys. Rev. Lett. 82 1345 [8] Pan J W, Daniell M, Gasparoni S, Weihs G and Zeilinger A 2001 Phys. Rev. Lett. 86 4435 [9] Zhao Z, Chen Y A, Zhang A N, Yang T, Briegel H J and Pan J W 2004 Nature 430 54 [11] Rauschenbeutel A et al 2000 Science 288 2024 [12] Roos C F et al 2004 Science 304 1478 [13] Sackett C A et al 2000 Nature 404 256 [14] Guo G P, Li C F, Li J and Guo G C 2002 Phys. Rev. A 65 042102 [15] Lee J et al 2008 Phys. Rev. A 77 032327 [16] Tang L 2009 Chin. Phys. Lett. 26 020307 [17] Duan L M and Kimble H J 2003 Phys. Rev. Lett. 90 253601 [18] Deng Z J, Feng M and Gao K L 2006 Phys. Rev. A 73 014302 [19] Hong J and Lee H W 2002 Phys. Rev. Lett. 89 237901 [20] Barchielli A and Belavkin V 1991 J. Phys. A 24 1495 [21] Maunz P et al 2003 Phys. Rev. Lett. 94 033002 [22] Brune M et al 1994 Phys. Rev. Lett. 72 3339
2010, Vol. 27 
