Novel entropic dynamics of donor–acceptor quantum dot system

Abstract

We explore various aspects of the entropy of the donor–acceptor QD system (GaAs – (Ga, Al)As) under the effect of terahertz excitation and magnetic field. We solve the optical Bloch equations of the system in presence of the total dephasing rate. The analysis illustrate the presence of the sudden death and sudden birth of entropy. It is shown that these phenomena can be controlled using system parameters and likewise determining the influence of the magnetic field on the donor–acceptor system. By selectively choosing the system's parameters, it is possible to control the dynamics of entropy.

keywords: Donor-acceptor systems; Entropic dynamics; Quantum dots