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21 papers · 2 filters
The superfluid fountain effect in a Bose-Einstein condensate
Tomasz Karpiuk, Benoit Gremaud, Christian Miniatura +1
We consider a simple experimental setup, based on a harmonic confinement, where a Bose-Einstein condensate and a thermal cloud of weakly interacting alkali atoms are trapped in two…
Quantum criticality in disordered bosonic optical lattices
Xiaoming Cai, Shu Chen, Yupeng Wang
Using the exact Bose-Fermi mapping, we study universal properties of ground-state density distributions and finite-temperature quantum critical behavior of one-dimensional hard-cor…
Mixture of Tonks-Girardeau gas and Fermi gas in one-dimensional optical lattices
Shu Chen, Junpeng Cao, Shi-Jian Gu
We study the Bose-Fermi mixture with infinitely boson-boson repulsion and finite boson-Fermion repulsion. By using a generalized Jordan-Wigner transformation, we show that the syst…
Itinerant ferromagnetism in a Fermi gas with contact interaction: Magnetic properties in a dilute Hubbard model
Chia-Chen Chang, Shiwei Zhang, David M. Ceperley
Ground state properties of the repulsive Hubbard model on a cubic lattice are investigated by means of the auxiliary-field quantum Monte Carlo method. We focus on low-density syste…
Effective super Tonks-Girardeau gases as ground states of strongly attractive multi-component fermions
Xiangguo Yin, Xi-Wen Guan, M T Batchelor +1
In the strong interaction limit, attractive fermions with -component hyperfine states in a one-dimensional waveguide form unbreakable bound cluster states. We demonstrate that t…
Stable Fulde-Ferrell-Larkin-Ovchinnikov pairing states in 2D and 3D optical lattices
Zi Cai, Yupeng Wang, Congjun Wu
We present the study of the Fulde-Ferrell-Larkin-Ovchinnikov (FFLO) pairing states in the -orbital bands in both two and three-dimensional optical lattices. Due to the quasi one…