The two-body random spin ensemble and a new type of quantum phase transition

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dc.creatorPizorn, Iztok
dc.creatorProsen, Tomaz
dc.creatorMossmann, Stefan
dc.creatorSeligman, Thomas H.
dc.date2007-11-08
dc.date.accessioned2026-07-07T09:23:28Z
dc.date.available2026-07-07T09:23:28Z
dc.descriptionWe study the properties of a two-body random matrix ensemble for distinguishable spins. We require the ensemble to be invariant under the group of local transformations and analyze a parametrization in terms of the group parameters and the remaining parameters associated with the "entangling" part of the interaction. We then specialize to a spin chain with nearest neighbour interactions and numerically find a new type of quantum phase transition related to the strength of a random external field i.e. the time reversal breaking one body interaction term.
dc.description15 pages, 6 eps figures, submitted to New J. Phys
dc.identifierhttps://arxiv.org/abs/0711.1218
dc.identifierhttp://arxiv.org/abs/0711.1218
dc.identifierNew J. Phys. 10 (2008) 023020
dc.identifierdoi:10.1088/1367-2630/10/2/023020
dc.identifier.urihttp://salesiana.dossiersoluciones.com/handle/123456789/155745
dc.subjectQuantum Physics
dc.titleThe two-body random spin ensemble and a new type of quantum phase transition
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