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cond-mat.mes-hall2005
Extended Bose-Hubbard model with incompressible states at fractional numbers
H. Heiselberg
The Bose-Hubbard model is extended to include nearest and far neighbor interactions and is related to the fractional quantum Hall effect (FQHE). Both models may be studied in optic…
cond-mat.supr-con2005
Sound modes at the BCS-BEC crossover
H. Heiselberg
First and second sound speeds are calculated for a uniform superfluid gas of fermi atoms as a function of temperature, density and interaction strength. The second sound speed is o…