Abstract
In this article, temperature effects on strong coupling polaron in a RbCl asymmetrical semi-exponential quantum well (ASEQW) are studied by applying the quantum statistical theory (QST). Based on the well-known LLP unitary transformation and linear combination operation (LCO) methods, we have derived the ground state energy and the mean phonon number of strong coupling polaron in the ASEQW. According to the obtained results, ground state energy decreases with increasing temperature, whereas mean phonon number increases by increasing temperature. The ground state energy and mean phonon number are decaying functions with raising parameter $\sigma $ , whereas they are enhancing ones with lifting parameter $U_{0}$ .
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