Entropy and Wigner Functions

Details Entropy and Wigner Functions Entropy and Wigner Functions

2002-03-20

arxiv.org/abs/quant-ph/0203102v1

Phys. Rev E 62, 4665 (2000)

Physics

Quantum Physics

18 pages

Scientific paper

10.1103/PhysRevE.62.4665

The properties of an alternative definition of quantum entropy, based on Wigner functions, are discussed. Such definition emerges naturally from the Wigner representation of quantum mechanics, and can easily quantify the amount of entanglement of a quantum state. It is shown that smoothing of the Wigner function induces an increase in entropy. This fact is used to derive some simple rules to construct positive definite probability distributions which are also admissible Wigner functions

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