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When is the Wigner function of multidimensional systems nonnegative?

J. Math. Phys. 24, 97 (1983); doi:10.1063/1.525607

Issue Date: January 1983

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Francisco Soto and Pierre Claverie
Laboratoire de Chimie Quantique, Institut de Biologie Physico-Chimique, 13, rue Pierre et Marie Curie, 75005 Paris, France
It is shown that, for systems with an arbitrary number of degrees of freedom, a necessary and sufficient condition for the Wigner function to be nonnegative is that the corresponding state wavefunction is the exponential of a quadratic form. This result generalizes the one obtained by Hudson [Rep. Math. Phys. 6, 249 (1974)] for one-dimensional systems. Journal of Mathematical Physics is copyrighted by The American Institute of Physics.
History: Received 24 February 1981; accepted 18 September 1981
Permalink: http://link.aip.org/link/?JMAPAQ/24/97/1
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KEYWORDS and PACS

Keywords
PACS
  • 03.65.Bz
    Classical and quantum physics: mechanics and fields Quantum theory quantum mechanics Foundations, theory of measurement, miscellaneous theories
  • 03.65.Ca
    Classical and quantum physics: mechanics and fields Quantum theory quantum mechanics Formalism
  • 05.30.Ch
    Statistical physics and thermodynamics Quantum statistical mechanics Quantum ensemble theory
  • YEAR: 1983

PUBLICATION DATA

ISSN:
0022-2488 (print)   1089-7658 (online)
Publisher:
AIP is a member of CrossRef AIP

REFERENCES (12)

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  1. E. Wigner, Phys. Rev. 40, 749–759 (1932).
  2. J. E. Moyal, Proc. Cambridge Philos. Soc. 45, 99–124 (1949).
  3. S. De Groot, La transformation de Weyl et la fonction de Wigner: une forme alternative de la mécanique quantique (Les Presses de l'Université de Montréal, 1974).
  4. R. L. Hudson, Rep. Math. Phys. 6, 249–252 (1974).
  5. C. Piquet, C. R. Acad. Sci. Paris A 279, 107–109 (1974).
  6. R. J. Glauber, Phys. Rev. 131, 2766–2788 (1963).
  7. J. C. T. Pool, J. Math. Phys. 7, 66–76 (1966).
  8. B. A. Fuks, Introduction to the Theory of Analytic Functions of Several Complex Variables (American Mathematical Society, Providence, R. I., 1963).
  9. R. P. Boas, Entire Functions (Academic, New York, 1954).
  10. H. Cartan, Théories Elémentaire des Fonctions Analytiques d'une ou plusieurs variables complexes (Hermann, Paris, 1963). English translation: Elementary Theory of Analytic Functions of one or several Variables (Addison Wesley, Reading, Mass.), See Sec. IV 2.3.
  11. C. Piquet (private communication).
  12. W. Feller, Introduction to probability theory and its applications (Wiley, New York, 1966), Chap. XV, Sec. 8, pp. 498–499.

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