Multipartite entangled states in coupled quantum dots and cavity-QED

Details Multipartite entangled states in coupled quantum dots and cavity-QED Multipartite entangled states in coupled quantum dots and cavity-QED

2002-12-06

arxiv.org/abs/quant-ph/0212034v1

Phys. Rev. A 67, 022302 (2003).

Physics

Quantum Physics

9 pages, 4 figures, to appear in Phys. Rev. A

Scientific paper

10.1103/PhysRevA.67.022302

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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