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Type: Artigo
Title: Statistical thermodynamics of the Frohlich-Bose-Einstein condensation of magnons out of equilibrium
Author: Vannucchi, Fabio Stucchi
Luzzi, Roberto
Abstract: This work presents a nonequilibrium statistical-thermodynamic approach to the study of a Frohlich-Bose-Einstein condensation of magnons under radio-frequency radiation pumping. Frohlich-Bose-Einstein condensates display a complex behavior consisting in steady-state conditions to the emergence of a synergetic dissipative structure resembling the Bose-Einstein condensation of systems in equilibrium. Then a kind of "two-fluid model" arises: the "normal" nonequilibrium structure and the Frohlich condensate, which is shown to be an attractor to the system. In this study we analyze some aspects of the irreversible thermodynamics of this dissipative complex system. We obtained the expression for the informational entropy of the two-fluid condensate and introduced an order parameter to characterize the role of the Frohlich interaction in ordering the system. The analysis highlights the order increase due to the Frohlich interaction. We also study the informational entropy production of the system, considering its internal and external parts. Finally, the Glansdorff-Prigogine criteria for evolution and (in) stability are verified.
Subject: Entropia
Bose-Einstein, Condensação de
Bose-Einstein condensation
Country: Estados Unidos
Editor: American Physical Society
Rights: aberto
Identifier DOI: 10.1103/PhysRevE.100.032126
Date Issue: 2019
Appears in Collections:IFGW - Artigos e Outros Documentos

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