Entanglement in quantum critical spin systems

Simple item page
dc.creatorRoscilde, Tommaso
dc.creatorVerrucchi, Paola
dc.creatorFubini, Andrea
dc.creatorHaas, Stephan
dc.creatorTognetti, Valerio
dc.date2004-12-07
dc.date.accessioned2026-07-07T06:11:43Z
dc.date.available2026-07-07T06:11:43Z
dc.descriptionWe study the field dependence of the entanglement of formation in anisotropic S=1/2 antiferromagnetic chains and two-leg ladders displaying a T=0 field-driven quantum phase transition. The analysis is carried out via Quantum Monte Carlo simulations. At zero temperature the entanglement estimators show abrupt changes at and around criticality, vanishing below the critical field, in correspondence with an exactly factorized state, and then immediately recovering a finite value upon passing through the quantum phase transition. At the quantum critical point, a deep minimum in the pairwise-to-global entanglement ratio shows that multi-spin entanglement is strongly enhanced; moreover this signature represents a novel way of detecting the quantum phase transition of the system, relying entirely on entanglement estimators.
dc.description5 pages, 4 figures. Contributed paper to the MQC2 conference, Naples 2004
dc.identifierhttps://arxiv.org/abs/quant-ph/0412056
dc.identifierhttp://arxiv.org/abs/quant-ph/0412056
dc.identifier.urihttp://salesiana.dossiersoluciones.com/handle/123456789/92567
dc.subjectQuantum Physics
dc.subjectStrongly Correlated Electrons
dc.titleEntanglement in quantum critical spin systems
dc.typetext

Files

Collections

arXiv