Effective theory for trapped few-fermion systems

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Autor(es): dc.contributorLos Alamos National Laboratory-
Autor(es): dc.contributorUniversity of Arizona-
Autor(es): dc.contributorRijksuniversiteit Groningen-
Autor(es): dc.contributorUniversidade Estadual Paulista (UNESP)-
Autor(es): dc.contributorIowa State University-
Autor(es): dc.creatorStetcu, I.-
Autor(es): dc.creatorBarrett, B. R.-
Autor(es): dc.creatorVan Kolck, U.-
Autor(es): dc.creatorVary, J. P.-
Data de aceite: dc.date.accessioned2025-08-21T21:36:49Z-
Data de disponibilização: dc.date.available2025-08-21T21:36:49Z-
Data de envio: dc.date.issued2022-04-28-
Data de envio: dc.date.issued2022-04-28-
Data de envio: dc.date.issued2007-12-14-
Fonte completa do material: dc.identifierhttp://dx.doi.org/10.1103/PhysRevA.76.063613-
Fonte completa do material: dc.identifierhttp://hdl.handle.net/11449/225021-
Fonte: dc.identifier.urihttp://educapes.capes.gov.br/handle/11449/225021-
Descrição: dc.descriptionWe apply the general principles of effective field theories to the construction of effective interactions suitable for few- and many-body calculations in a no-core shell model framework. We calculate the spectrum of systems with three and four two-component fermions in a harmonic trap. In the unitary limit, we find that three-particle results are within 10% of known semianalytical values even in small model spaces. The method is very general, and can be readily extended to other regimes, more particles, different species (e.g., protons and neutrons in nuclear physics), or more-component fermions (as well as bosons). As an illustration, we present calculations of the lowest-energy three-fermion states away from the unitary limit and find a possible inversion of parity in the ground state in the limit of trap size large compared to the scattering length. Furthermore, we investigate the lowest positive-parity states for four fermions, although we are limited by the dimensions we can currently handle in this case. © 2007 The American Physical Society.-
Descrição: dc.descriptionTheoretical Division Los Alamos National Laboratory, Los Alamos, NM 87545-
Descrição: dc.descriptionDepartment of Physics University of Arizona, Tucson, AZ 85721-
Descrição: dc.descriptionKernfysisch Versneller Instituut Rijksuniversiteit Groningen, Zernikelaan 25, 9747 AA Groningen-
Descrição: dc.descriptionInstituto de Física Teórica Universidade Estadual Paulista, Rua Pamplona 145, 01405-900 São Paulo, SP-
Descrição: dc.descriptionDepartment of Physics and Astronomy Iowa State University, Ames, IA 50011-
Descrição: dc.descriptionInstituto de Física Teórica Universidade Estadual Paulista, Rua Pamplona 145, 01405-900 São Paulo, SP-
Idioma: dc.languageen-
Relação: dc.relationPhysical Review A - Atomic, Molecular, and Optical Physics-
???dc.source???: dc.sourceScopus-
Título: dc.titleEffective theory for trapped few-fermion systems-
Tipo de arquivo: dc.typelivro digital-
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