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Phase diagram and quasiparticles of a lattice SU(2) scalar-fermion model in 2+1 dimensions

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dc.contributor.authorAlonso, J.L.
dc.contributor.authorBoucaud, Ph.
dc.contributor.authorMartín Mayor, Víctor
dc.contributor.authorvan der Sijs, A.J.
dc.date.accessioned2023-06-20T20:28:23Z
dc.date.available2023-06-20T20:28:23Z
dc.date.issued2000-02-01
dc.description© 1999 The American Physical Society. We are indebted to L.A. Fernández for very helpful remarks and stimulating discussions. We also acknowledge interesting discussions with A. Cruz, Ph. de Forcrand, M.A. Stephanov, and A. Tarancón. We thank the RTNN collaboration for computing facilities. This work is financially supported by CICYT (Spain), projects AEN 96-1670, AEN 96- 1674, AEN 97-1680 and by Acción Integrada HispanoFrancesa HF1996-0022.
dc.description.abstractThe phase diagram at zero temperature of a lattice SU(2) scalar-fermion model in 211 dimensions is studied numerically and with mean-field methods. Special attention is devoted to the strong coupling regime. We have developed a new method to adapt the hybrid Monte Carlo algorithm to the O(3) non-linear σ model constraint. The charged excitations in the various phases are studied at the mean-field level. Bound states of two charged fermions are found in a strongly coupled paramagnetic phase. On the other hand, in the strongly coupled antiferromagnetic phase fermionic excitations around momenta (±π/2, ±π/2, ±π/2) emerge.
dc.description.departmentDepto. de Física Teórica
dc.description.facultyFac. de Ciencias Físicas
dc.description.refereedTRUE
dc.description.sponsorshipCICYT (Spain)
dc.description.sponsorshipAcción Integrada HispanoFrancesa
dc.description.statuspub
dc.eprint.idhttps://eprints.ucm.es/id/eprint/46784
dc.identifier.doi10.1103/PhysRevD.61.034501
dc.identifier.issn0556-2821
dc.identifier.officialurlhttp://dx.doi.org/10.1103/physrevd.61.034501
dc.identifier.relatedurlhttps://journals.aps.org
dc.identifier.urihttps://hdl.handle.net/20.500.14352/60326
dc.issue.number3
dc.journal.titlePhysical review D
dc.language.isoeng
dc.publisherAmer Physical Soc
dc.relation.projectIDAEN 96-1670
dc.relation.projectIDAEN 96-1674
dc.relation.projectIDAEN 97-1680
dc.relation.projectIDHF1996-0022
dc.rights.accessRightsopen access
dc.subject.cdu53
dc.subject.keywordMonte-Carlo
dc.subject.keywordNumerical-simulation
dc.subject.keyword3 dimensions
dc.subject.keywordGauge fields
dc.subject.keywordTransition
dc.subject.keywordNeutrinos
dc.subject.keywordAbsence
dc.subject.keywordProof.
dc.subject.ucmFísica-Modelos matemáticos
dc.titlePhase diagram and quasiparticles of a lattice SU(2) scalar-fermion model in 2+1 dimensions
dc.typejournal article
dc.volume.number61
dspace.entity.typePublication
relation.isAuthorOfPublication061118c0-eadf-4ee3-8897-2c9b65a6df66
relation.isAuthorOfPublication.latestForDiscovery061118c0-eadf-4ee3-8897-2c9b65a6df66

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