Quantum caloric effects
arxiv(2024)
Abstract
Quantum thermodynamics aims to explore quantum features to enhance energy
conversion beyond classical limits. While significant progress has been made,
the understanding of caloric potentials in quantum systems remains incomplete.
In this context, this study focuses on deriving general expressions for these
caloric potentials by developing a quantum Maxwell relationship obtained from a
thermal average form of the Ehrenfest theorem. Our results recover the
classical cases and also reveal that the isothermal entropy change can be
related to genuine quantum correlations in the system. Thus, this work provides
a comprehensive framework for understanding the caloric behavior of quantum
systems and their potential applications in caloric devices.
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