Multipartite entangled states in coupled quantum dots and cavity QED

Xiaoguang Wang; Mang Feng; Barry C. Sanders

doi:10.1103PhysRevA.67.022302

Multipartite entangled states in coupled quantum dots and cavity QED

Xiaoguang Wang, Mang Feng, Barry C. Sanders

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Abstract

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.

Original language	English
Pages (from-to)	022302-1-022302-8
Number of pages	8
Journal	Physical Review A - Atomic, Molecular, and Optical Physics
Volume	67
Issue number	2
DOIs	https://doi.org/10.1103PhysRevA.67.022302
Publication status	Published - 2003

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AB - 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.

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Multipartite entangled states in coupled quantum dots and cavity QED

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