Periodic thermodynamics of the Rabi model with circular polarization for arbitrary spin quantum numbers
Autor(en): | Schmidt, Heinz-Juergen Schnack, Juergen Holthaus, Martin |
Stichwörter: | Physics; Physics, Fluids & Plasmas; Physics, Mathematical; SYSTEMS | Erscheinungsdatum: | 2019 | Herausgeber: | AMER PHYSICAL SOC | Journal: | PHYSICAL REVIEW E | Volumen: | 100 | Ausgabe: | 4 | Zusammenfassung: | We consider a spin s 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 quasistationary 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. |
ISSN: | 24700045 | DOI: | 10.1103/PhysRevE.100.042141 |
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geprüft am 19.05.2024