Physics – Condensed Matter – Strongly Correlated Electrons
Scientific paper
2011-05-06
Physics
Condensed Matter
Strongly Correlated Electrons
4 pages, 4 figures + Supplementary Material
Scientific paper
We numerically determine the very rich phase diagram of mass-imbalanced binary mixtures of hardcore bosons (or equivalently -- fermions, or hardcore-Bose/Fermi mixtures) loaded in one-dimensional optical lattices. Focusing on commensurate fillings away from half filling, we find a strong asymmetry between attractive and repulsive interactions. Attraction is found to always lead to pairing, associated with a spin gap, and to pair crystallization for very strong mass imbalance. In the repulsive case the two atomic components remain instead fully gapless over a large parameter range; only a very strong mass imbalance leads to the opening of a spin gap. The spin-gap phase is the precursor of a crystalline phase occurring for an even stronger mass imbalance. The fundamental asymmetry of the phase diagram is at odds with recent theoretical predictions, and can be tested directly via time-of-flight experiments on trapped cold atoms.
Dalmonte Marcello
Esposti Boschi Cristian Degli
Roscilde Tommaso
No associations
LandOfFree
Pairing, crystallization and string correlations of mass-imbalanced atomic mixtures in one-dimensional optical lattices does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.
If you have personal experience with Pairing, crystallization and string correlations of mass-imbalanced atomic mixtures in one-dimensional optical lattices, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Pairing, crystallization and string correlations of mass-imbalanced atomic mixtures in one-dimensional optical lattices will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-576756