Multipartite entangled states in coupled quantum dots and cavity QED

作     者：Xiaoguang Wang Mang Feng Barry C. Sanders 

作者机构：Department of Physics and Centre for Advanced Computing—Algorithms and Cryptography Macquarie University Sydney New South Wales 2109 Australia Institute for Scientific Interchange (ISI) Foundation Viale Settimio Severo 65 I-10133 Torino Italy 

出 版 物：《Physical Review A》 (Phys Rev A)

年 卷 期：2003年第67卷第2期

页      面：022302-022302页

核心收录：

学科分类：07[理学] 0702[理学-物理学] 

主　　题：Quantum cryptography 

摘      要：We investigate the generation of multipartite entangled state in a system of N quantum dots embedded in a microcavity and examine the emergence of genuine multipartite entanglement by three different characterizations of entanglement. At certain times of dynamical evolution one can generate multipartite entangled coherent exciton states or multiqubit W states by initially preparing the cavity field in a superposition of coherent states or the Fock state with one photon, respectively. Finally, we study environmental effects on multipartite entanglement generation and find that the decay rate for the entanglement is proportional to the number of excitons.