May 29, 1998

Wehrl's entropy and classification of states

Rep. Math. Phys. 43, 283 (1999)

A. Orłowski

The usefulness of Wehrl's entropy in quantum optics is investigated. Possible applications to the classification of quantum states with respect to their statistical properties are presented. A general variational proof of the observation that for a given average photon number the maximum Wehrl's entropy is attained for thermal states is given.