Environment-controlled Floquet-state paramagnetism

Abstract

We study the response of ideal spin systems which are interacting with both a strong oscillating magnetic field, and a thermal environment, to a weak probing magnetic field. We demonstrate that even the sign of the resulting mean magnetization depends on the amplitude of the driving field, and that its absolute value can be significantly larger than the equilibrium magnetization in the absence of time-periodic forcing. Since the underlying Floquet-state occupation probabilities are determined by the precise form of the system-bath coupling, future measurements of such effects have the potential to establish a particularly innovative line of research, providing information on nonequilibrium thermodynamics, and giving access to quantities which usually remain hidden when probing equilibrium systems.

7 pages, 9 figures

References in corpus (7)

• A.C. susceptibility as a probe of low-frequency magnetic dynamics
• Condition for emergence of the Floquet-Gibbs state in periodically driven open systems
• Stochastic thermodynamics of rapidly driven systems
• Statistical mechanics of Floquet systems with regular and chaotic states
• Environment-governed dynamics in driven quantum systems
• Periodic thermodynamics of the parametrically driven harmonic oscillator
• Floquet-state cooling