Spin models in complex magnetic fields : A hard sign problem

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dc.contributor.author Rindlisbacher, T.
dc.contributor.author De Forcrand, P.
dc.contributor.editor Gamiz Sanchez E., Pena Ruano C.
dc.contributor.editor Fritzsch P., Della Morte M.
dc.contributor.editor Della Morte, M.
dc.contributor.editor Fritzsch, P.
dc.contributor.editor Gámiz Sánchez , E.
dc.contributor.editor Pena Ruan, C.
dc.date.accessioned 2019-03-04T16:09:01Z
dc.date.available 2019-03-04T16:09:01Z
dc.date.issued 2018
dc.identifier.citation Rindlisbacher , T , De Forcrand , P , Gamiz Sanchez E. , P R C (ed.) & Fritzsch P. , D M M (ed.) 2018 , Spin models in complex magnetic fields : A hard sign problem . in M Della Morte , P Fritzsch , E Gámiz Sánchez & C Pena Ruan (eds) , 35th International Symposium on Lattice Field Theory (Lattice 2017) . , 07026 , EPJ Web of Conferences , vol. 175 , EDP sciences , Les Ulis , International Symposium on Lattice Field Theory , Granada , Spain , 18/06/2017 . https://doi.org/10.1051/epjconf/201817507026
dc.identifier.citation conference
dc.identifier.other PURE: 122917781
dc.identifier.other PURE UUID: 14d4b451-8a37-4c2f-837f-e6b9c1823390
dc.identifier.other Bibtex: urn:331b8f024fb0e515356c31d010d1dd43
dc.identifier.other Scopus: 85045142903
dc.identifier.other ORCID: /0000-0003-2617-4319/work/68618402
dc.identifier.uri http://hdl.handle.net/10138/299851
dc.description.abstract Coupling spin models to complex external fields can give rise to interesting phenomena like zeroes of the partition function (Lee-Yang zeroes, edge singularities) or oscillating propagators. Unfortunately, it usually also leads to a severe sign problem that can be overcome only in special cases; if the partition function has zeroes, the sign problem is even representation-independent at these points. In this study, we couple the N-state Potts model in different ways to a complex external magnetic field and discuss the above mentioned phenomena and their relations based on analytic calculations (1D) and results obtained using a modified cluster algorithm (general D) that in many cases either cures or at least drastically reduces the sign-problem induced by the complex external field. © The Authors, published by EDP Sciences, 2018. en
dc.format.extent 8
dc.language.iso eng
dc.publisher EDP sciences
dc.relation.ispartof 35th International Symposium on Lattice Field Theory (Lattice 2017)
dc.relation.ispartofseries EPJ Web of Conferences
dc.rights cc_by
dc.rights.uri info:eu-repo/semantics/openAccess
dc.subject 114 Physical sciences
dc.subject 115 Astronomy, Space science
dc.title Spin models in complex magnetic fields : A hard sign problem en
dc.type Conference contribution
dc.contributor.organization Particle Physics and Astrophysics
dc.description.reviewstatus Peer reviewed
dc.relation.doi https://doi.org/10.1051/epjconf/201817507026
dc.relation.issn 2101-6275
dc.rights.accesslevel openAccess
dc.type.version publishedVersion

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