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The European Physical Journal D

, Volume 61, Issue 1, pp 241–247 | Cite as

Smoothed Wigner-distributions, decoherence, and the temperature-dependence of the classical-quantum frontier

  • F. PenniniEmail author
  • A. Plastino
Article

Abstract.

We discuss the strange behavior at T = 0 of the phase-space Wigner distribution of the harmonic oscillator with the help of the purely quantal concepts of participation ratio of a mixed state and decoherence parameter. We also show that Wigner distribution-smoothing yields interesting insights, specially in the pathological instance in which the Wigner-Fano factor diverges. The associated decoherence parameter also sheds some light on temperature-dependence of the classical-quantum frontier.

Keywords

Harmonic Oscillator Fisher Information Wigner Function Fano Factor Participation Ratio 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.

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Copyright information

© EDP Sciences, SIF, Springer-Verlag Berlin Heidelberg 2010

Authors and Affiliations

  1. 1.Departamento de FísicaUniversidad Católica del NorteAntofagastaChile
  2. 2.Instituto de Física La Plata-CCT-CONICET, Facultad de Ciencias Exactas, Universidad Nacional de La PlataLa PlataArgentina

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