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Many body exchange effects close to the s-wave Feshbach resonance in two-component Fermi systems: is a triplet superfluid possible?
- DOI:
- 10.1080/09500830701501823
pages 713-721
Available online: 10 Sep 2007Abstract
We suggest that the exchange fluctuations close to a Feshbach resonance in a two-component Fermi gas can result in an effective p-wave attractive interaction. On the BCS side of a Feshbach resonance, the magnitude of this effective interaction is comparable to the s-wave interaction, therefore leading to a possible spin-triplet superfluid in the range of temperatures of actual experiments. We also show that the particle--hole exchange fluctuations introduce an effective scattering length which does not diverge, as the standard mean-field one does. Finally, using the effective interaction quantities we are able to model the molecular binding energy on the BEC side of the resonance.
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- Citation information:
- Available online: 10 Sep 2007
Author affiliations
- a Dipartimento di Fisica, Universita’ ‘La Sapienza’ di Roma, P.le Aldo Moro 2 and CNR-ISC, via Dei Taurini 19, Rome, 00185, Italy
- b Max-Planck-Institut für Sonnensystemforschung, 37191 Katlenburg-Lindau, Germany
- c Department of Physics, Boston College, 140 Commonwealth Ave, Chestnut Hill, MA 02139, USA
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- 2010 Impact Factor: 1.262 (©2011 Thomson Reuters, Journal Citation Reports®)
- James Clerk Maxwell Young Writers Prize
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