Entangled states in resonance atomic-field interactions

NASSER METWALLY, Mahmoud Abdel‐Aty, A.‐S. F. Obada

Hong Li

A method for the generation of entangled states via non resonant interaction of Ξ type three level atom with a coherent state cavity field is presented. It is shown that many type atomic entangled states can be obtained under a simple condition.

陈美锋

杨贞标

An alternative scheme is presented for teleportation of a two-atom entangled state in cavity quantum electrodynamics (QED). It is based on the resonant atom–cavity field interaction. In the scheme, only one cavity is involved, and the number of the atoms needed to be detected is decreased compared with the previous scheme. Since the resonant atom–cavity field interaction greatly reduces the interaction time, the decoherence effect can be effectively suppressed during the teleportation process. The experimental feasibility of the scheme is discussed. The scheme can easily be generalized to the teleportation of N-atom Greeninger–Horne–Zeilinger (GHZ) entangled states. The number of atoms needed to be detected does not increase as the number of the atoms in the GHZ state increases.

Igor Bargatin, B. A. Grishanin, Виктор Николаевич Задков

Zheng Shi-Biao, Guo Guang-Can

A scheme is presented for preparing multi-atom entangled states based on the Raman atom-cavity-field interaction. After several degenerate Λ-type three-level atoms interact with an appropriately prepared single-mode cavity field through Raman coupling, a two-level atom, resonant with the cavity, is sent through the cavity and a Ramsey zone. The detection of the two-level atom leaves the Λ-type atoms in an entangled state.