The ground-state lifetime of polaron in a parabolic
quantum dot
Yu Yi-Fu; Xiao Jing-Lin; Yin Ji-Wen; Wang Zi-Wu
【期刊名称】《《中国物理：英文版》》 【年(卷),期】2008(017)006
【摘要】This paper reports that the ground-state energy of polaxon was obtained with strong electron-LO-phonon coupling by using a variational method of the Pekax type in a parabolic quantum dot. Quantum transition is occurred in the quantum system due to the electron-phonon interaction and the influence of temperature. That is the polaxon transit from the ground-state to the first-excited state after absorbing a LO-phonon and it causes the change of the polaxon lifetime. Numerical calculations are performed and the results illustrate that the ground-state lifetime of the polaron will increase with increasing the ground-state energy of polaxon and decrease with increasing the electron-LO-phonon coupling strength, the confinement length of the quantum dot and the temperature. 【总页数】4页(2236-2239)
【关键词】quantum dot; polaron; lifetime
【作者】Yu Yi-Fu; Xiao Jing-Lin; Yin Ji-Wen; Wang Zi-Wu
【作者单位】Department of Physic and Electronic Information Engineering Chifeng College Chifeng 024000 China; College of Physics
The ground-state lifetime of polaron in a parabolic quantum dot
