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Competing orders in one-dimensional half-integer fermionic cold atoms: A conformal field theory approach
- Source :
-
Nuclear Physics B . Aug2008, Vol. 798 Issue 3, p443-469. 27p. - Publication Year :
- 2008
-
Abstract
- Abstract: The physical properties of arbitrary half-integer spins fermionic cold atoms loaded into a one-dimensional optical lattice are investigated by means of a conformal field theory approach. We show that for attractive interactions two different superfluid phases emerge for : A BCS pairing phase, and a molecular superfluid phase which is formed from bound-states made of 2N fermions. In the low-energy approach, the competition between these instabilities and charge-density waves is described in terms of parafermionic degrees of freedom. The quantum phase transition for is universal and shown to belong to the Ising and three-state Potts universality classes respectively. In contrast, for , the transition is non-universal. For a filling of one atom per site, a Mott transition occurs and the nature of the possible Mott-insulating phases are determined. [Copyright &y& Elsevier]
Details
- Language :
- English
- ISSN :
- 05503213
- Volume :
- 798
- Issue :
- 3
- Database :
- Academic Search Index
- Journal :
- Nuclear Physics B
- Publication Type :
- Academic Journal
- Accession number :
- 31752093
- Full Text :
- https://doi.org/10.1016/j.nuclphysb.2007.12.034