Symmetry and size effects on energy and entanglement of an exciton in coupled quantum dots

doi:10.1088/1674-1056/22/4/047101

Abstract We study theoretically the essential properties of an exciton in vertically coupled Gaussian quantum dots in the presence of an external magnetic field. The ground state energy of a heavy-hole exciton is split into four energy levels due to the Zeeman effect. For the symmetrical system, the entanglement entropy of the exciton state can reach a value of 1. However, for a system with broken symmetry, it is close to zero. Our results are in good agreement with previous studies.

Keywords: exciton coupled Gaussian quantum dot symmetry entanglement entropy

Received: 06 August 2012
Revised: 16 October 2012
Accepted manuscript online:

PACS:	71.35.Ji	(Excitons in magnetic fields; magnetoexcitons)
	73.21.La	(Quantum dots)
	73.22.Gk	(Broken symmetry phases)

Fund: Project supported by the National Natural Science Foundation of China (Grant Nos. 61176089 and 10905016) and the Natural Science Foundation of Hebei Province, China (Grant Nos. A2011205092 and A2011208010).

Corresponding Authors: Liu Jian-Jun
E-mail: liujj@mail.hebtu.edu.cn

Cite this article:

Shen Man (沈曼), Bai Yan-Kui (白彦魁), An Xing-Tao (安兴涛), Liu Jian-Jun (刘建军) Symmetry and size effects on energy and entanglement of an exciton in coupled quantum dots 2013 Chin. Phys. B 22 047101

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Symmetry and size effects on energy and entanglement of an exciton in coupled quantum dots

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