Calendario Attività

Wigner Continuity Equations for Quantum Decoherence, Purity and VN Entropy

Categoria
Seminario
Data
19 Dicembre 2017 16:00 - 17:30
Luogo
14 - 15 IV piano St. 9
Affiliation
Departamento de F?sica - UFSCAR - Sao Carlos - SP - Brasil

A fluid analog of the information flux in the phase-space associated to purity and von Neumann entropy are identified in the Weyl-Wigner formalism of quantum mechanics. Once constrained by symmetry and positiveness, the encountered continuity equations provide novel quantifiers for non-classicality (non-Liouvillian fluidity) given in terms of quantum decoherence, purity and von Neumann entropy fluxes. Through definitions in the Weyl-Wigner formalism, one can identify the quantum fluctuations that distort the classical-quantum coincidence regime, and the corresponding quantum information profile, whenever some bounded x ? p volume of the phase-space is specified. The dynamics of anharmonic systems is investigated in order to illustrate such a novel paradigm for describing quantumness and classicality through the flux of quantum information in the phase- space.

 
 

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