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The ground-state lifetime of bound polaron in a parabolic quantum dot

✍ Scribed by Wei-Ping Li; Zi-Wu Wang; Ji-Wen Yin; Yi-Fu Yu; Jing-Lin Xiao

Publisher
Elsevier Science
Year
2008
Tongue
English
Weight
260 KB
Volume
403
Category
Article
ISSN
0921-4526

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✦ Synopsis

The ground-state energy of bound polaron was obtained with strong electron-LO-phonon coupling using a variational method of the Pekar type in a parabolic quantum dot (QD). Quantum transition occurred in the quantum system due to the electron-phonon interaction and the influence of temperature. That is the polaron transit from the ground state to the first-excited state after absorbing a LO-phonon and it changes the polaron lifetime. Numerical calculations are performed and the results illustrate the relations of the ground-state lifetime of the bound polaron on the ground-state energy of polaron, the electron-LO-phonon coupling strength, the confinement length of the quantum dot, the temperature and the Coulomb binding parameter.

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