Quantum Correlations Relativity for Continuous Variable Systems
Quantum Physics
2013-04-01 v5
Abstract
It is shown that a choice of degrees of freedom of a bipartite continuous variable system determines amount of non-classical correlations (quantified by discord) in the system's state. Non-classical correlations (that include entanglement as a special kind of correlations) are ubiquitous for such systems. For a quantum state, if there are not non-classical correlations (quantum discord is zero) for one, there are in general non-classical correlations (quantum discord is non-zero) for another set of the composite system's degrees of freedom. The physical relevance of this 'quantum correlations relativity' is emphasized also in the more general context.
Cite
@article{arxiv.1112.5797,
title = {Quantum Correlations Relativity for Continuous Variable Systems},
author = {M. Dugic and M. Arsenijevic and J. Jeknic-Dugic},
journal= {arXiv preprint arXiv:1112.5797},
year = {2013}
}
Comments
rewritten, 10 pages; accepted by Science China PMA (2012)