Mutiparticle Composites in Density-Imbalanced Quantum Fluids

Burovski, Evgeny and Orso, Giuliano and Jolicoeur, Thierry (2009) Mutiparticle Composites in Density-Imbalanced Quantum Fluids. Physical review letters, 103 (21). ISSN 1079-7114

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Abstract

We consider two-component one-dimensional quantum gases with a density imbalance. While generically such fluids are two-component Luttinger liquids, we show that if the ratio of the densities is a rational number, p/q, and mass asymmetry between components is sufficiently strong, one of the two eigenmodes acquires a gap. The gapped phase corresponds to (algebraic) ordering of (p+q)-particle composites. In particular, for attractive mixtures, this implies that the superconducting correlations are destroyed. We illustrate our predictions by numerical simulations of the fermionic Hubbard model with hopping asymmetry.

Item Type:
Journal Article
Journal or Publication Title:
Physical review letters
Additional Information:
© 2009 The American Physical Society
Uncontrolled Keywords:
/dk/atira/pure/researchoutput/libraryofcongress/qc
Subjects:
ID Code:
54500
Deposited By:
Deposited On:
24 May 2012 08:30
Refereed?:
Yes
Published?:
Published
Last Modified:
18 Oct 2020 00:45