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Self-bound many-body states of quasi-one-dimensional dipolar Fermi gases: Exploiting Bose-Fermi mappings for generalized contact interactions
KTH, Centres, Nordic Institute for Theoretical Physics NORDITA.
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2013 (English)In: Physical Review A. Atomic, Molecular, and Optical Physics, ISSN 1050-2947, E-ISSN 1094-1622, Vol. 88, no 3, 033611- p.Article in journal (Refereed) Published
Abstract [en]

Using a combination of results from exact mappings and from mean-field theory we explore the phase diagram of quasi-one-dimensional systems of identical fermions with attractive dipolar interactions. We demonstrate that at low density these systems provide a realization of a single-component one-dimensional Fermi gas with a generalized contact interaction. Using an exact duality between one-dimensional Fermi and Bose gases, we show that when the dipole moment is strong enough, bound many-body states exist, and we calculate the critical coupling strength for the emergence of these states. At higher densities, the Hartree-Fock approximation is accurate, and by combining the two approaches we determine the structure of the phase diagram. The many-body bound states should be accessible in future experiments with ultracold polar molecules.

Place, publisher, year, edition, pages
2013. Vol. 88, no 3, 033611- p.
National Category
Physical Sciences
Identifiers
URN: urn:nbn:se:kth:diva-129616DOI: 10.1103/PhysRevA.88.033611ISI: 000324139900004Scopus ID: 2-s2.0-84884855930OAI: oai:DiVA.org:kth-129616DiVA: diva2:653431
Funder
Swedish Research Council
Note

QC 20131004

Available from: 2013-10-04 Created: 2013-10-03 Last updated: 2017-12-06Bibliographically approved

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