Evolution of the quantized field coupled to a thermal bath: a phase space approach

E. P. Mattos; A. Vidiella-Barranco

doi:10.1016/j.aop.2020.168321

paper

Evolution of the quantized field coupled to a thermal bath: a phase space approach

arXiv:2010.09944 · doi:10.1016/j.aop.2020.168321

Abstract

We present an alternative method for describing the evolution of a mode of the quantized electromagnetic field in contact with a finite temperature thermal bath. We use the expansion of the field density operator in terms of coherent states and the related Glauber-Sudarshan $P$ -function in phase space. The method allows us to obtain analytical expressions of the system's time-evolved $P$ -function without needing to solve the corresponding master equation.