articleJournal of Optics B Quantum and Semiclassical OpticsAug 25, 2004GREEN OA

Negativity of the Wigner function as an indicator of non-classicality

AKAnatole KenfackKYKarol yczkowski

Université de Dschang · Max Planck Institute for the Physics of Complex Systems · +3 more institutions

Indexed inarxivcrossref

Abstract

A measure of nonclassicality of quantum states based on the volume of the negative part of the Wigner function is proposed. We analyze this quantity for Fock states, squeezed displaced Fock states and cat-like states defined as coherent superposition of two Gaussian wave packets.

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Topics & keywords

Topics
Keywords
  • Wigner distribution function
  • Fock space
  • Superposition principle
  • Negativity effect
  • Coherent states
  • Gaussian
  • Q-function
  • Quantum mechanics
UN Sustainable Development Goals
  • Reduced inequalities
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