Preparation of entangled simultaneous nonresonant atomic states through atom-field interaction

S. Ya. Kilin, Vyacheslav Shatokhin

Chen Mei-Feng

A scheme is proposed for generating a three-atom maximal entanglement W state. It is based on the simultaneous nonresonant interaction of atoms with a single-mode cavity field. Our scheme is insensitive to the cavity field, so the cavity field in our scheme can be initially in thermal states.

Chen, Zhihua, Lin - +1 more

Ma Song-She

A scheme for remote preparation of a two-atom entangled state is presented, which is based on the simultaneous nonresonant interaction of atoms with a single-mode cavity field. In view of the fact that two-particle entanglement is more easily generated than three-particle entanglement, the scheme prepares a two-atom entangled state via two pairs of two-atom entangled state as the quantum channel. Let two identical atoms Alice possesses interact with a single-mode cavity field simultaneously. Alice knows the state she wants to prepare. She selects a proper interaction time, measures the states of the atoms she possesses, and informs Bob of her measurement through a classical channel. Bob introduces an identical auxiliary atom and a single-mode cavity field in vacuum state to achieve the scheme. The scheme is insensitive to the cavity field states and cavity decay. The preparation can be achieved in a simple way. Based on current cavity quantum electrodynamics technique, the scheme can be realized experimentally.

Hongcai Li

A scheme for preparation of the maximal entangled states for Ξ-type three-level atoms in a thermal cavity is proposed.Because of preparing the maximal entangled states by the simultaneous nonresonant interaction between many uniform multilevel atoms and a single-mode cavity,the thermal effects and the decay of the cavity are all eliminated.It also suggests a scheme for preparation of the maximal entangled states for four-level atoms in a thermal cavity.

Vladan Vuletić