中国物理B ›› 2010, Vol. 19 ›› Issue (4): 44204-044204.doi: 10.1088/1674-1056/19/4/044204
• CLASSICAL AREAS OF PHENOMENOLOGY • 上一篇 下一篇
郑仕标
Zheng Shi-Biao(郑仕标)†
摘要: This paper proposes a decoherence-immune scheme for generating highly entangled states for two atoms trapped in a cavity. The scheme is based on two resonant atom-cavity interactions. Conditional upon the detection of no photon, the two atoms may exchange an excitation via the first resonant interaction, which leads to entanglement. Due to the loss of the excitation, the two atoms are in a mixed entangled state. With the help of an auxiliary ground state not coupled to the cavity mode, the state related to the excitation loss is eliminated by the detection of a photon resulting from the second resonant interaction. Thus, the fidelity of entanglement is almost not affected by the decoherence.
中图分类号: (Quantum state engineering and measurements)