title: Reduced dynamics of two oscillators collectively coupled to a thermal bath.
abstract: We study the reduced dynamics of a pair of nondegenerate oscillators coupled collectively to a thermal bath. The model is related to the trilinear boson model where the idler mode is promoted to a field. Due to nonlinear coupling, the Markovian master equation for the pair of oscillators admits non-Gaussian equilibrium states, where the modes distribute according to the Bose-Einstein statistics. These states are metastable before the nonlinear coupling is taken over by linear coupling between the individual oscillators and the field. The Gibbs state for the individual modes lies in the subspace with infinite occupation quantum number. We present the time evolution of a few states to illustrate the behaviors of the system.
authors.affiliation: Foundation Studies, Faculty of Engineering, University of Nottingham Malaysia Campus, Jalan Broga, 43500 Semenyih, Selangor, Malaysia. BuangAnn.Tay@nottingham.edu.my
authors.forename: B A
authors.initials: BA
authors.lastname: Tay
mesh_terms: D003198:Computer Simulation; D006358:Hot Temperature; D015233:Models, Statistical; D009991:Oscillometry / Q000379:methods*; D013816:Thermodynamics