Please use this identifier to cite or link to this item: http://repositorio.unicamp.br/jspui/handle/REPOSIP/244235
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dc.contributor.CRUESPUNIVERSIDADE ESTADUAL DE CAMPINASpt_BR
dc.contributor.authorunicampVitiello, Silvio Antonio Sachettopt_BR
dc.contributor.authorunicampSchmidt, Kevinpt_BR
dc.typeArtigopt_BR
dc.titleContact interaction in a unitary ultracold Fermi gaspt_BR
dc.contributor.authorPessoa, Renatopt_BR
dc.contributor.authorGandolfi, S.pt_BR
dc.contributor.authorVitiello, S. A.pt_BR
dc.contributor.authorSchmidt, K. E.pt_BR
dc.subjectMétodo de Monte Carlopt_BR
dc.subjectFérmionspt_BR
dc.subjectSuperfluidezpt_BR
dc.subject.otherlanguageMonte Carlo methodpt_BR
dc.subject.otherlanguageFermionspt_BR
dc.subject.otherlanguageSuperfluiditypt_BR
dc.description.abstractAn ultracold Fermi atomic gas at unitarity presents universal properties that in the dilute limit can be well described by a contact interaction. By employing a guiding function with correct boundary conditions and making simple modifications to the sampling procedure we are able to calculate the properties of a true contact interaction with the diffusion Monte Carlo method. The results are obtained with small variances. Our calculations for the Bertsch and contact parameters are in reasonable agreement with published experiments. The possibility of using a more faithful description of ultracold atomic gases can help uncover additional features of ultracold atomic gases. In addition, this work paves the way to perform quantum Monte Carlo calculations for other systems interacting with contact interactions, where the description using potentials with finite effective range might not be accurate.en
dc.description.abstractAn ultracold Fermi atomic gas at unitarity presents universal properties that in the dilute limit can be well described by a contact interaction. By employing a guiding function with correct boundary conditions and making simple modifications to the sampling procedure we are able to calculate the properties of a true contact interaction with the diffusion Monte Carlo method. The results are obtained with small variances. Our calculations for the Bertsch and contact parameters are in reasonable agreement with published experiments. The possibility of using a more faithful description of ultracold atomic gases can help uncover additional features of ultracold atomic gases. In addition, this work paves the way to perform quantum Monte Carlo calculations for other systems interacting with contact interactions, where the description using potentials with finite effective range might not be accurate.pt_BR
dc.relation.ispartofPhysical review. A, Atomic, molecular and optical physicspt_BR
dc.relation.ispartofabbreviationPhys. rev. Apt_BR
dc.publisher.cityCollege Park, MDpt_BR
dc.publisher.countryEstados Unidospt_BR
dc.publisherAmerican Physical Societypt_BR
dc.date.issued2015pt_BR
dc.date.monthofcirculationDec.pt_BR
dc.identifier.citationContact Interaction In A Unitary Ultracold Fermi Gas. Amer Physical Soc, v. 92, p. DEC-2015.pt_BR
dc.language.isoengpt_BR
dc.description.volume92pt_BR
dc.description.issuenumber6pt_BR
dc.description.firstpage1pt_BR
dc.description.lastpage7pt_BR
dc.rightsabertopt_BR
dc.sourceWOSpt_BR
dc.identifier.issn1050-2947pt_BR
dc.identifier.eissn1094-1622pt_BR
dc.identifier.doi10.1103/PhysRevA.92.063625pt_BR
dc.identifier.urlhttp://journals.aps.org/pra/abstract/10.1103/PhysRevA.92.063625pt_BR
dc.description.sponsorshipFAPESP - FUNDAÇÃO DE AMPARO À PESQUISA DO ESTADO DE SÃO PAULOpt_BR
dc.description.sponsorshipCAPES - COORDENAÇÃO DE APERFEIÇOAMENTO DE PESSOAL DE NÍVEL SUPERIORpt_BR
dc.description.sponsorship1FAPESP - FUNDAÇÃO DE AMPARO À PESQUISA DO ESTADO DE SÃO PAULOpt_BR
dc.description.sponsorship1CAPES - COORDENAÇÃO DE APERFEIÇOAMENTO DE PESSOAL DE NÍVEL SUPERIORpt_BR
dc.description.sponsordocumentnumberFAPESP [FAPESP-2014/20864-2]pt
dc.description.sponsordocumentnumberFAPESP [FAPESP-2010/10072-0]pt
dc.description.sponsordocumentnumber2014/20864-2pt_BR
dc.description.sponsordocumentnumber2010/10072-0pt_BR
dc.description.sponsordocumentnumber087/2012pt_BR
dc.description.sponsordocumentnumber11540/13-3pt_BR
dc.date.available2016-06-07T13:35:59Z-
dc.date.accessioned2016-06-07T13:35:59Z-
dc.description.provenanceMade available in DSpace on 2016-06-07T13:35:59Z (GMT). No. of bitstreams: 1 wos_000366491400008.pdf: 670282 bytes, checksum: c2abae65f4200e596b897fd0a70b53f1 (MD5) Previous issue date: 2015 Bitstreams deleted on 2020-09-02T13:41:20Z: wos_000366491400008.pdf,. Added 1 bitstream(s) on 2020-09-02T13:45:32Z : No. of bitstreams: 1 000366491400008.pdf: 801838 bytes, checksum: 5700e5b43b7acc0d20c8e54e3b660854 (MD5)en
dc.identifier.urihttp://repositorio.unicamp.br/jspui/handle/REPOSIP/244235-
dc.contributor.departmentDepartamento de Física da Matéria Condensadapt_BR
dc.contributor.departmentDepartamento de Física da Matéria Condensadapt_BR
dc.contributor.unidadeInstituto de Física Gleb Wataghinpt_BR
dc.contributor.unidadeInstituto de Física Gleb Wataghinpt_BR
dc.identifier.source000366491400008pt_BR
dc.creator.orcid0000-0002-8216-6033pt_BR
dc.creator.orcid0000-0002-1597-9835pt_BR
dc.type.formArtigopt_BR
dc.identifier.articleid063625pt_BR
dc.description.sponsorNoteR.P. thanks the hospitality of the Department of Physics of the Arizona State University. S.A.V. is happy to acknowledge the hospitality of JILA specifically that of Ana Maria Rey and Murray Holland. We thank Deborah Jin, Tara Drake, and Rabin Paudel for very useful discussions and also for sharing with us their experimental values. This work was partially supported by the U.S. Department of Energy, Office of Nuclear Physics, under Contract DE-AC52-06NA25396 by the programs NUCLEI SciDac and LANL LDRD, the National Science Foundation Grant No. PHY-1404405 and by grants of the Brazilian agencies FAPESP-2014/20864-2, FAPESP-2010/10072-0pt_BR
dc.description.sponsorNoteCAPES 11540/13-3 and PVE-087/2012. Computational resources have been provided by Los Alamos Open Supercomputing and CENAPAD-SP at Unicamp. We also used resources provided by NERSC, which is supported by the US DOE under contract DE-AC02-05CH11231.pt_BR
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