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首页> 外文期刊>Physica, B. Condensed Matter >The ground-state lifetime of bound polaron in a parabolic quantum dot
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The ground-state lifetime of bound polaron in a parabolic quantum dot

机译:抛物线形量子点中束缚极化子的基态寿命

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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.
机译:使用抛物线量子点(QD)中Pekar型的变分方法,通过强电子-LO-声子耦合,获得了绑定极化子的基态能量。由于电子-声子相互作用和温度的影响,量子系统中发生了量子跃迁。那就是极化子在吸收了LO声子后从基态跃迁到第一激发态,从而改变了极化子的寿命。进行了数值计算,结果说明了束缚极化子的基态寿命与极化子的基态能量,电子-LO-声子耦合强度,量子点的约束长度,温度和能级之间的关系。库仑结合参数。

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