Probing microscopic models for system-bath interactions via parametric driving
Abstract
We show that strong parametric driving of a quantum harmonic oscillator coupled to a thermal bath allows one to distinguish between different microscopic models for the oscillator-bath coupling. We consider a bath with an Ohmic spectral density and a model where the system-bath interaction can be tuned continuously between position and momentum coupling via the coupling angle . We derive a master equation for the reduced density operator of the oscillator in Born-Markov approximation and investigate its quasi-steady state as a function of the driving parameters, the temperature of the bath and the coupling angle . We find that the time-averaged variance of position and momentum exhibits a strong dependence on these parameters. In particular, we identify parameter regimes that maximise the -dependence and provide an intuitive explanation of our results.
Cite
@article{arxiv.1803.07785,
title = {Probing microscopic models for system-bath interactions via parametric driving},
author = {Anastasia S. D. Dietrich and Martin Kiffner and Dieter Jaksch},
journal= {arXiv preprint arXiv:1803.07785},
year = {2018}
}
Comments
13 pages, 8 figures