Data di Pubblicazione:
2008
Citazione:
Thermal bound entanglement in macroscopic systems and area law / A. Ferraro, D. Cavalcanti, A. Garcia-Saez, A. Acin. - In: PHYSICAL REVIEW LETTERS. - ISSN 0031-9007. - 100:8(2008 Feb 28), pp. 080502.1-080502.4. [10.1103/PhysRevLett.100.080502]
Abstract:
Does bound entanglement naturally appear in quantum many-body systems? We address this question by showing the existence of bound-entangled thermal states for harmonic oscillator systems consisting of an arbitrary number of particles. By explicit calculations of the negativity for different partitions, we find a range of temperatures for which no entanglement can be distilled by means of local operations, despite the system being globally entangled. We offer an interpretation of this result in terms of entanglement-area laws, typical of these systems. Finally, we discuss generalizations of this result to other systems, including spin chains.
Tipologia IRIS:
01 - Articolo su periodico
Elenco autori:
A. Ferraro, D. Cavalcanti, A. Garcia-Saez, A. Acin
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