Quantum phase transition in spin systems studied through entanglement estimators

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dc.creatorFubini, Andrea
dc.creatorHaas, Stephan
dc.creatorRoscilde, Tommaso
dc.creatorTognetti, Valerio
dc.creatorVerrucchi, Paola
dc.date2006-05-24
dc.date.accessioned2026-07-07T07:09:10Z
dc.date.available2026-07-07T07:09:10Z
dc.descriptionEntanglement represents a pure quantum effect involving two or more particles. Spin systems are good candidates for studying this effect and its relation with other collective phenomena ruled by quantum mechanics. While the presence of entangled states can be easily verified, the quantitative estimate of this property is still under investigation. One of the most useful tool in this framework is the concurrence whose definition, albeit limited to $S=1/2$ systems, can be related to the correlators. We consider quantum spin systems defined along chains and square lattices, and described by Heisenberg-like Hamiltonians: our goal is to clarify the relation between entanglement and quantum phase transitions, as well as that between the concurrence the and the specific quantum state of the system.
dc.description10 pages, 2 figures. To appear in "Open Systems & Information Dynamics" (2006)
dc.identifierhttps://arxiv.org/abs/cond-mat/0605602
dc.identifierhttp://arxiv.org/abs/cond-mat/0605602
dc.identifier.urihttp://salesiana.dossiersoluciones.com/handle/123456789/110961
dc.subjectStatistical Mechanics
dc.subjectStrongly Correlated Electrons
dc.titleQuantum phase transition in spin systems studied through entanglement estimators
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