Quantum fluctuation induced ordered phase in the Blume-Capel model

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dc.creatorTodoroki, Norikazu
dc.creatorMiyashita, Seiji
dc.date2004-09-24
dc.date2004-09-30
dc.date.accessioned2026-07-07T06:33:12Z
dc.date.available2026-07-07T06:33:12Z
dc.descriptionWe consider the Blume-Capel model with the quantum tunneling between the excited states. We find a magnetically ordered phase transition induced by quantum fluctuation in a model. The model has no phase transition in the corresponding classical case. Usually, quantum fluctuation breaks ordered phase as in the case of the transverse field Ising model. However, in present case, an ordered phase is induced by quantum fluctuation. Moreover, we find a phase transition between a quantum paramagnetic phase and a classical diamagnetic phase at zero temperature. We study the properties of the phase transition by using a mean field approximation (MFA), and then, by a quantum Monte Carlo method to confirm the result of the MFA.
dc.description7 pages, 6 figures, corrected some typos
dc.identifierhttps://arxiv.org/abs/cond-mat/0409673
dc.identifierhttp://arxiv.org/abs/cond-mat/0409673
dc.identifierJournal of the Physical Society of Japan Vol. 74 No. 11, November, 2005 pp. 2957-2960
dc.identifierdoi:10.1143/JPSJ.74.2957
dc.identifier.urihttp://salesiana.dossiersoluciones.com/handle/123456789/99115
dc.subjectStatistical Mechanics
dc.titleQuantum fluctuation induced ordered phase in the Blume-Capel model
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