Quantumness Witnesses
Quantum Physics
2008-11-21 v1
Abstract
A recently proposed test of quantumness [R. Alicki and N. Van Ryn, J. Phys. A: Math. Theor. 41 062001 (2008)] is put into a broader mathematical and physical perspective. The notion of quantumness witness is introduced, in analogy to entanglement witness, and illustrated by examples of a single qubit and many-body systems with additive observables. We compare also our proposal with the quantumness test based on quantum correlations (entanglement) and Bell inequalities. A class of quantumness witnesses associated to the phase space representation is also discussed.
Cite
@article{arxiv.0807.2615,
title = {Quantumness Witnesses},
author = {Robert Alicki and Marco Piani and Nicholas Van Ryn},
journal= {arXiv preprint arXiv:0807.2615},
year = {2008}
}
Comments
11 pages, 4 figures