DISCRIMINATING 16 MUTUALLY ORTHOGONAL 4-ATOM CLUSTER STATES VIA CAVITY QED IN TELEPORTING ARBITRARY UNKNOWN TWO-ATOM STATE WITH A 4-ATOM CLUSTER STATE AS QUANTUM CHANNEL

Wen Zhang, Yi-Min Liu, Zhang-Yin Wang and Zhan-Jun Zhang ()
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Wen Zhang: School of Physics & Material Science, Anhui University, Hefei 230039, China
Yi-Min Liu: Department of Physics, Shaoguan University, Shaoguan 512005, China
Zhang-Yin Wang: School of Physics & Material Science, Anhui University, Hefei 230039, China
Zhan-Jun Zhang: School of Physics & Material Science, Anhui University, Hefei 230039, China;

International Journal of Modern Physics C (IJMPC), 2008, vol. 19, issue 05, 741-747

Abstract: We propose a scheme for discriminating 16 mutually orthogonal 4-atom cluster entangled states (CES) via cavity QED in teleporting an arbitrary unknown two-atom state with a 4-atom CES as quantum channel. Utilizing the interaction of atoms with cavity and classical field, the complicated 4-atom CESs are transformed into the simple 4-atom product states. Hence the difficulty of measurement during the teleportation process is degraded. In the present scheme, we allow for the case of a strong classical driving field and the detuning between the atoms and the cavity is assumed large enough. Thereby the photon-number-dependent parts in the effective Hamiltonian can be neglected, and the scheme is insensitive to both the cavity decay and the thermal field.

Keywords: Quantum teleportation; atomic cluster entangled state (CES); cavity QED; 03.67.Mn; 03.67.Hk (search for similar items in EconPapers)
Date: 2008
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DOI: 10.1142/S0129183108012455

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