关键词: 量子信息, 二能级体系, 变分法, 量子点.

Abstract:

On the condition of electron-LO phonon strong coupling in a parabolic quantum dot , we obtain the eigenenergies and the eigenfuctions of the ground state and the first excited state using variational method of Pekar type. The system in quantum dot may be employed as a two- level quantum system qubit. The relations on the electron-LO phonon strong coupling, the confinement length with the electron probability density were investigated. The results indicate that the electron probability density increases with increasing the electron-LO phonon strong coupling and decreasing the confinement length. Our results should be meaningful for making a qubit.

Key words: quantum information, two-level system, variational method, quantum dot