摘要
An analytical method based on four-wave mixing （FWM） is here developed to study the generation of entangled state in an asymmetric semiconductor double quantum well structure. It is found that the maximally entangled state of two beams （the probe and four-wave mixing beams） can be achieved in an appropriate condition. Moreover, we also show that the two entangled beams propagate with ultraslow group velocity in the semiconductor medium. This investigation can be used for achieving the entangled beams in the semiconductor solid-state medium, which is much more practical than that in an atomic medium because of its flexible design and the wide adjustable parameters.
基金
Supported by the National Natural Science Foundation of China under Grant Nos. 10575040, 10874050, and 10904033
by the National Basic Research Program of China under Grant No. 2005CB724508
by the Programme for Talent Introduction of Hubei Normal University under Grant No. 2008F10
