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29 March 2024
 
  » arxiv » 0904.0569

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Multi-particle composites in density-imbalanced quantum fluids
Evgeni Burovski ; Giuliano Orso ; Thierry Jolicoeur ;
Date 3 Apr 2009
AbstractWe consider two-component one-dimensional quantum gases with 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.
Source arXiv, 0904.0569
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