Frustration and time-reversal symmetry breaking for Fermi and Bose-Fermi systems

Bibliographic description

punktacja MEiN [2012 A]: 40

title:	Frustration and time-reversal symmetry breaking for Fermi and Bose-Fermi systems
author:	Sacha Krzysztof , Targońska Katarzyna , Zakrzewski Jakub
journal title:	Physical Review. A, Atomic, Molecular, and Optical Physics
volume:	85
issue:	5
date of publication :	2012
article ID:	053613
ISSN:	1050-2947
eISSN:	1094-1622 1538-4446
DOI:	10.1103/PhysRevA.85.053613
language:	English
journal language:	English
abstract in English:	The modulation of an optical lattice potential that breaks time-reversal symmetry enables the realization of complex tunneling amplitudes in the corresponding tight-binding model. For a superfluid Fermi gas in a triangular lattice potential with complex tunnelings, the pairing function acquires a complex phase, so the frustrated magnetism of fermions can be realized. Bose-Fermi mixtures of bosonic molecules and unbound fermions in the lattice also show interesting behavior. Due to boson-fermion coupling, the fermions become enslaved by the bosons and the corresponding pairing function takes the complex phase determined by the bosons. In the presence of bosons the Fermi system can reveal both gapped and gapless superfluidity.
affiliation:	Wydział Fizyki, Astronomii i Informatyki Stosowanej : Instytut Fizyki im. Mariana Smoluchowskiego
type:	journal article
subtype:	academic paper

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