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dc.contributor.authorFrancesconi, Oen
dc.contributor.authorHolzmann, Men
dc.contributor.authorLucini, Ben
dc.contributor.authorRago, Aen
dc.contributor.authorRantaharju, Jen
dc.date.accessioned2020-01-16T11:03:59Z
dc.date.available2020-01-16T11:03:59Z
dc.date.issued2019-12-09en
dc.identifier.urihttp://hdl.handle.net/10026.1/15319
dc.description.abstract

The study of QFTs at finite density is hindered by the presence of the so-called sign problem. The action definition of such systems is, in fact, complex-valued making standard importance sampling Monte Carlo methods ineffective. In this work, we shall review the generalized density of states method for complex action systems and the Linear Logarithmic Relaxation algorithm (LLR). We will focus on the recent developments regarding the bias control of the LLR method and the evaluation of general observables in the DoS+LLR framework. Recent results on the well-known relativistic Bose gas will be presented, proving that in our approach the phase factor can be consistently evaluated over hundreds of orders of magnitude. A first exploratory study on the Thirring model in the DoS formalism will be presented as well.

en
dc.language.isoenen
dc.titleComputing general observables in lattice models with complex actionsen
dc.typeJournal Article
plymouth.volume363en
plymouth.journalProceedings of Scienceen
plymouth.organisational-group/Plymouth
plymouth.organisational-group/Plymouth/Faculty of Science and Engineering
plymouth.organisational-group/Plymouth/Faculty of Science and Engineering/School of Engineering, Computing and Mathematics
plymouth.organisational-group/Plymouth/Users by role
plymouth.organisational-group/Plymouth/Users by role/Academics
plymouth.organisational-group/Plymouth/Users by role/Researchers in ResearchFish submission
dcterms.dateAccepted2019-01-01en
dc.rights.embargodate2022-01-21en
dc.identifier.eissn1824-8039en
dc.rights.embargoperiodNot knownen
rioxxterms.licenseref.urihttp://www.rioxx.net/licenses/all-rights-reserveden
rioxxterms.licenseref.startdate2019-12-09en
rioxxterms.typeJournal Article/Reviewen


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