Tomographic entropic inequalities in the probability representation of quantum mechanics

Abstract

A review of the tomographic-probability representation of classical and quantum states is presented. The tomographic entropies and entropic uncertainty relations are discussed in connection with ambiguities in the interpretation of the state tomograms which are considered either as a set of the probability distributions of random variables depending on extra parameters or as a single joint probability distribution of these random variables and random parameters with specific properties of the marginals. Examples of optical tomograms of photon states, symplectic tomograms, and unitary spin tomograms of qudits are given. A new universal integral inequality for generic wave function is obtained on the base of tomographic entropic uncertainty relations.Comment: 9 pages; to be published in AIP Conference Proceedings as a contribution to the conference "Beauty in Physics: Theory and Experiment" (the Hacienda Cocoyoc, Morelos, Mexico, May 14--18, 2012