Mostrar registro simples

dc.contributor.authorSantos, Eduardo Muccillo Monteiropt_BR
dc.contributor.authorTheumann, Alba Graciela Rivas dept_BR
dc.date.accessioned2014-10-09T02:13:09Zpt_BR
dc.date.issued2005pt_BR
dc.identifier.issn1098-0121pt_BR
dc.identifier.urihttp://hdl.handle.net/10183/104303pt_BR
dc.description.abstractWe analyze the infinite range Ising spin glass in a transverse-field below the critical temperature by a one step replica symmetry breaking theory. The set of n replicas is divided in r blocks of m replicas each. We present results for different values of the block-size parameter m. The spin operators are represented by bilinear combinations of fermionic fields and we compare the results of two models: In the four-states 4-S model the diagonal Si z operator has two unphysical vanishing eigenvalues, that are suppressed by a restraint in the two-states 2-S model. In the static approximation we obtain qualitatively similar results for both models. They both exhibit a critical temperature Tc that decreases when increases, until it reaches a quantum critical point at the same value of c and they are both unstable under replica symmetry breaking in the whole spin glass phase. Below the critical temperature we present results for the order parameters and free energy.en
dc.format.mimetypeapplication/pdf
dc.language.isoengpt_BR
dc.relation.ispartofPhysical review. B, Condensed matter and materials physics. Woodbury. Vol. 72, no. 1 (July 2005), 014447 5p.pt_BR
dc.rightsOpen Accessen
dc.subjectPontos criticospt_BR
dc.subjectSistemas de férmionspt_BR
dc.subjectModelo de isingpt_BR
dc.subjectVidros de spinpt_BR
dc.subjectAutovalorespt_BR
dc.subjectEnergia livrept_BR
dc.titleReplica symmetry breaking in the transverse-field Ising spin-glass model : two fermionic representationspt_BR
dc.typeArtigo de periódicopt_BR
dc.identifier.nrb000532904pt_BR
dc.type.originEstrangeiropt_BR


Thumbnail
   

Este item está licenciado na Creative Commons License

Mostrar registro simples