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Supershell structure in trapped dilute Fermi gases
Division of Mathematical Physics, LTH, Lund University, Lund, Sweden.
Division of Mathematical Physics, LTH, Lund University, Lund, Sweden.ORCID iD: 0000-0002-2630-7479
Division of Mathematical Physics, LTH, Lund University, Lund, Sweden.
Division of Mathematical Physics, LTH, Lund University, Lund, Sweden.
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2005 (English)In: Physical Review A. Atomic, Molecular, and Optical Physics, ISSN 1050-2947, E-ISSN 1094-1622, Vol. 72, no 5, article id 051602Article in journal (Refereed) Published
Abstract [en]

We show that a dilute harmonically trapped two-component gas of fermionic atoms with a weak repulsive interaction has a pronounced super-shell structure: The shell fillings due to the spherical harmonic trapping potential are modulated by a beat mode. This changes the "magic numbers" occurring between the beat nodes by half a period. The length and amplitude of this beating mode depend on the strength of the interaction. We give a simple interpretation of the beat structure in terms of a semiclassical trace formula for the symmetry breaking U(3)→SO(3).

Place, publisher, year, edition, pages
American Physical Society, 2005. Vol. 72, no 5, article id 051602
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Atom and Molecular Physics and Optics Condensed Matter Physics Other Physics Topics
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URN: urn:nbn:se:oru:diva-65580DOI: 10.1103/PhysRevA.72.051602ISI: 000233603400016Scopus ID: 2-s2.0-28844501818OAI: oai:DiVA.org:oru-65580DiVA, id: diva2:1188786
Available from: 2018-03-08 Created: 2018-03-08 Last updated: 2018-03-15Bibliographically approved

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Ögren, Magnus
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