%A Shen Man (沈曼), Bai Yan-Kui (白彦魁), An Xing-Tao (安兴涛), Liu Jian-Jun (刘建军) %T Symmetry and size effects on energy and entanglement of an exciton in coupled quantum dots %0 Journal Article %D 2013 %J Chin. Phys. B %R 10.1088/1674-1056/22/4/047101 %P 47101-047101 %V 22 %N 4 %U {https://cpb.iphy.ac.cn/CN/abstract/article_114747.shtml} %8 2013-03-01 %X 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.