Periodic thermodynamics of the Rabi model with circular polarization for arbitrary spin quantum numbers
Abstract
We consider a spin subjected to both a static and an orthogonally applied oscillating, circularly polarized magnetic field while being coupled to a heat bath, and analytically determine the quasi\-stationary distribution of its Floquet-state occupation probabilities for arbitrarily strong driving. This distribution is shown to be Boltzmannian with a quasitemperature which is different from the temperature of the bath, and independent of the spin quantum number. We discover a remarkable formal analogy between the quasithermal magnetism of the nonequilibrium steady state of a driven ideal paramagnetic material, and the usual thermal paramagnetism. Nonetheless, the response of such a material to the combined fields is predicted to show several unexpected features, even allowing one to turn a paramagnet into a diamagnet under strong driving. Thus, we argue that experimental measurements of this response may provide key paradigms for the emerging field of periodic thermodynamics.
Cite
@article{arxiv.1902.05814,
title = {Periodic thermodynamics of the Rabi model with circular polarization for arbitrary spin quantum numbers},
author = {Heinz-Jürgen Schmidt and Jürgen Schnack and Martin Holthaus},
journal= {arXiv preprint arXiv:1902.05814},
year = {2019}
}
Comments
12 figures, 2 additional appendices