Generalized entropic measures of quantum correlations

Journal Article · Mon Nov 15 04:00:00 EST 2010 · Physical Review. A

DOI:https://doi.org/10.1103/PHYSREVA.82.052342· OSTI ID:21528621

Rossignoli, R; Canosa, N; Ciliberti, L ^[1]

---

1. Departamento de Fisica-IFLP, Universidad Nacional de La Plata, C.C. 67, 1900 La Plata (Argentina)

We propose a general measure of nonclassical correlations for bipartite systems based on generalized entropic functions and majorization properties. Defined as the minimum information loss due to a local measurement, in the case of pure states it reduces to the generalized entanglement entropy, i.e., the generalized entropy of the reduced state. However, in the case of mixed states it can be nonzero in separable states, vanishing just for states diagonal in a general product basis, like the quantum discord. Simple quadratic measures of quantum correlations arise as a particular case of the present formalism. The minimum information loss due to a joint local measurement is also discussed. The evaluation of these measures in simple relevant cases is as well provided, together with comparison with the corresponding entanglement monotones.

• OSTI ID: 21528621
• Journal Information: Physical Review. A, Journal Name: Physical Review. A Journal Issue: 5 Vol. 82; ISSN 1050-2947; ISSN PLRAAN
• Country of Publication: United States
• Language: English

Related Subjects

71 CLASSICAL AND QUANTUM MECHANICS
GENERAL PHYSICS
CORRELATIONS
ENTROPY
INFORMATION
MAJORANA THEORY
MIXED STATES
PHYSICAL PROPERTIES
PURE STATES
QUANTUM ENTANGLEMENT
QUANTUM STATES
THERMODYNAMIC PROPERTIES