Multipartite entangled states in coupled quantum dots and cavity QED
Multipartite entangled states in coupled quantum dots and cavity QED
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DOI：
10.1103/physreva.67.022302
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发表时间：
2002-12
影响因子：
2.9
通讯作者：
Xiaoguang Wang;M. Feng;B. Sanders
中科院分区：
文献类型：
--
作者：
Xiaoguang Wang;M. Feng;B. Sanders
我们研究了嵌入微腔中的N个量子点系统中多体纠缠态的产生，并通过三种不同的纠缠特征考察了真正的多体纠缠的出现。在动力学演化的某些时刻，人们可以通过分别在相干态的叠加态或单光子的Fock态中制备腔场来产生多粒子纠缠相干激子态或多量子比特W态。最后，我们研究了环境对多体纠缠产生的影响，发现纠缠的衰减率与激子的数目成正比。
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.