Fourth moments reveal the negativity of the Wigner function

Bednorz, Adam; Belzig, Wolfgang

Fourth moments reveal the negativity of the Wigner function

Dateien

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Datum

2011

Open Access-Veröffentlichung

Open Access Green

Sammlungen

Physik

Publikationstyp

Zeitschriftenartikel

Publikationsstatus

Published

Erschienen in

Physical Review A. 2011, 83(5). ISSN 1050-2947. Available under: doi: 10.1103/PhysRevA.83.052113

Zusammenfassung

The presence of unique quantum correlations is the core of quantum-information processing and general quantum theory.We address the fundamental question of how quantum correlations of a generic quantum system can be probed using correlation functions defined for quasiprobability distributions. In particular, we discuss the possibility of probing the negativity of a quasiprobability by comparing moments of the Wigner function. We show that one must take at least the fourth moments to find the negativity in general and the eighth moments for states with a rotationally invariant Wigner function.

Fachgebiet (DDC)

530 Physik

Zitieren

ISO 690

BEDNORZ, Adam, Wolfgang BELZIG, 2011. Fourth moments reveal the negativity of the Wigner function. In: Physical Review A. 2011, 83(5). ISSN 1050-2947. Available under: doi: 10.1103/PhysRevA.83.052113

BibTex

@article{Bednorz2011Fourt-16169,
  year={2011},
  doi={10.1103/PhysRevA.83.052113},
  title={Fourth moments reveal the negativity of the Wigner function},
  number={5},
  volume={83},
  issn={1050-2947},
  journal={Physical Review A},
  author={Bednorz, Adam and Belzig, Wolfgang}
}

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Universitätsbibliographie

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