Factors influencing entanglement of two excitons in a coupled exciton--photon system

doi:10.1088/1674-1056/17/2/015

Abstract

Abstract The relation between the excitonic purity and the concurrence in a system of two coupled large semiconduction quantum dots mediated by a single-mode cavity field is investigated by using linear entropy theory. The results show the difference in describing two modes of excitonic entanglement between linear entropy and concurrence. The relation between nonclassical property of cavity field and the entanglement degree of excitons is also discussed. The results show that two modes of exciton can reach maximal entanglement when the cavity exhibits an antibunching effect.

Keywords: quantum dot exciton linear entropy antibunching effect

Received: 17 August 2007
Revised: 13 August 2007
Accepted manuscript online:

PACS:	71.35.Gg	(Exciton-mediated interactions)
	73.21.La	(Quantum dots)

Fund: Project supported by the Scientific Research Fund of Education Bureau of Hunan Province (Grant No 05C696).

Cite this article:

Yang Xiong(杨雄), Xiang Shao-Hua(向少华), and Song Ke-Hui(宋克慧) Factors influencing entanglement of two excitons in a coupled exciton--photon system 2008 Chin. Phys. B 17 435

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Factors influencing entanglement of two excitons in a coupled exciton--photon system

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