Universal Fermi Gas with Two- and Three-Body Resonances

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dc.creatorNishida, Yusuke
dc.creatorSon, Dam Thanh
dc.creatorTan, Shina
dc.date2007-11-10
dc.date2008-02-28
dc.date.accessioned2026-07-07T11:13:04Z
dc.date.available2026-07-07T11:13:04Z
dc.descriptionWe consider a Fermi gas with two components of different masses, with the s-wave two-body interaction tuned to unitarity. In the range of mass ratio 8.62<M/m<13.6, it is possible for a single contact interaction between heavy fermions to produce a resonance in a three-body channel. The resulting system is scale invariant and has universal properties, and is very strongly interacting. When M/m is slightly above the lower limit 8.62, the ground state energy of a 2:1 mixture of heavy and light fermions is less than 2% of the energy of a noninteracting gas with the same number densities. We derive exact relationships between the pressures of the unitary Fermi gases with and without three-body resonance when the mass ratio is close to the critical values of 8.62 and 13.6. Possible experimental realization with cold atoms in optical lattices is discussed.
dc.description4 pages, 1 figure. Possible experimental realization with cold atoms in optical lattices is discussed in the 2nd version
dc.identifierhttps://arxiv.org/abs/0711.1562
dc.identifierhttp://arxiv.org/abs/0711.1562
dc.identifierPhys.Rev.Lett.100:090405,2008
dc.identifierdoi:10.1103/PhysRevLett.100.090405
dc.identifier.urihttp://salesiana.dossiersoluciones.com/handle/123456789/191590
dc.subjectOther Condensed Matter
dc.subjectNuclear Theory
dc.titleUniversal Fermi Gas with Two- and Three-Body Resonances
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