2020/08/10 by Dominik Šafránek, Anthony Aguirre, Joseph Schindler +1 · 1 voice · 4 citations
Physics and Astronomy · #quant-ph #cond-mat.quant-gas #cond-mat.stat-mech
paper · pdf · doi:10.1007/s10701-021-00498-x
In the past several years, observational entropy has been developed as both a (time-dependent) quantum generalization of Boltzmann entropy, and as a rather general framework to encompass classical and quantum equilibrium and non-equilibrium coarse-grained entropy. In this paper we review the construction, interpretation, most important properties, and some applications of this framework. The treatment is self-contained and relatively pedagogical, aimed at a broad class of researchers.