量子棒中弱耦合极化子声子平均数

采用线性组合算符和幺正变换的方法研究了在抛物限制势下量子棒中电子一体纵光学（LO）声子弱耦合极化子中电子周围的平均声子数．讨论了在弱耦合情况下,电子周围的平均声子数与电子-声子耦合常数及纵横比的关系．     

The optical phonon effect of quantum rod qubits

The Hamiltonian of a quantum rod with an ellipsoidal boundary is given by using a coordinate transformation in which the ellipsoidal boundary is changed into a spherical one.Under the condition of strong electron-longitudinal optical phonon coupling in the rod,we obtain both the electron eigenfunctions and the eigenenergies of the ground and first-excited state by using the Pekar-type variational method.This quantum rod system may be used as a two-level qubit.When the electron is in the superposition state of the ground and first-excited states,the probability density of the electron oscillates in the rod with a certain period.It is found that the oscillation period is an increasing function of the ellipsoid aspect ratio and the transverse and longitudinal effective confinement lengths of the quantum rod,whereas it is a decreasing function of the electron-phonon coupling strength.