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dc.contributor.authorSchonenberg, LMen
dc.contributor.authorVerpoort, Philippen
dc.contributor.authorConduit, Garethen
dc.date.accessioned2018-09-04T09:54:52Z
dc.date.available2018-09-04T09:54:52Z
dc.date.issued2017-08-22en
dc.identifier.issn2469-9926
dc.identifier.urihttps://www.repository.cam.ac.uk/handle/1810/279076
dc.description.abstractThe Feshbach resonance provides precise control over the scattering length and effective range of interactions between ultracold atoms. We propose the ultratransferable pseudopotential to model effective interaction ranges -1.5≤kF2Reff2≤0, where Reff is the effective range and kF is the Fermi wave vector, describing narrow to broad Feshbach resonances. We develop a mean-field treatment and exploit the pseudopotential to perform a variational and diffusion Monte Carlo study of the ground state of the two-dimensional Fermi gas, reporting on the ground-state energy, contact, condensate fraction, momentum distribution, and pair-correlation functions as a function of the effective interaction range across the BEC-BCS crossover. The limit kF2Reff2→- is a gas of bosons with zero binding energy, whereas ln(kFa)→- corresponds to noninteracting bosons with infinite binding energy.
dc.description.sponsorshipThe authors acknowledge the financial support of the EPSRC Grant no. [EP/J017639/1], L.M.S. acknowledges financial support from the Cambridge European Trust, Cambridge Philosophical Society, VSB Fonds, and the Prins Bernhard Cultuurfonds, and G.J.C. acknowledges the financial support of the Royal Society and Gonville & Caius College. Computational facilities were provided by the University of Cambridge High Performance Computing Service.
dc.publisherAmerican Physical Society
dc.titleEffective-range dependence of two-dimensional Fermi gasesen
dc.typeArticle
prism.number023619en
prism.publicationDate2017en
prism.publicationNamePhysical Review Aen
prism.volume96en
dc.identifier.doi10.17863/CAM.23239
dcterms.dateAccepted2017-07-25en
rioxxterms.versionofrecord10.1103/PhysRevA.96.023619en
rioxxterms.versionAM*
rioxxterms.licenseref.urihttp://www.rioxx.net/licenses/all-rights-reserveden
rioxxterms.licenseref.startdate2017-08-22en
dc.contributor.orcidVerpoort, Philipp [0000-0003-1319-5006]
dc.contributor.orcidConduit, Gareth [0000-0003-3807-6361]
dc.identifier.eissn2469-9934
rioxxterms.typeJournal Article/Reviewen
pubs.funder-project-idRoyal Society (uf130122)
pubs.funder-project-idEPSRC (EP/J017639/1)


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