Inequalities in R\'enyi's quantum thermodynamics

Abstract

A theory of thermodynamics has been recently formulated and derived on the basis of R\'enyi entropy and its relative versions. In this framework, we define the concepts of partition function, internal energy and free energy, and fundamental quantum thermodynamical inequalities are deduced. In the context of R\'enyi's thermodynamics, the variational Helmholtz principle is stated and the condition of equilibrium is analyzed. The R\'enyi maximum entropy principle is formulated and the equality case is discussed. The obtained results reduce to the von Neumann ones when the R\'enyi entropic parameter $\alpha$ approaches 1. The Heisenberg and Schr\"odinger uncertainty principles on the measurements of quantum observables are revisited. The presentation is self-contained and the proofs only use standard matrix analysis techniques.