Self trapping in the two-dimensional Bose-Hubbard model
arXiv:1307.0821 · doi:10.1103/PhysRevA.88.031606
Abstract
We study the expansion of harmonically trapped bosons in a two-dimensional lattice after suddenly turning off the confining potential. We show that, in the presence of multiple occupancies per lattice site and strong interactions, the system exhibits a clear dynamical separation into slowly and rapidly expanding clouds. We discuss how this effect can be understood within a simple picture by invoking doublons and Bose enhancement. This picture is corroborated by an analysis of the momentum distribution function in the regions with slowly and rapidly expanding bosons.
7 pages, 8 figures, as published
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- Sudden expansion of Mott insulators in one dimension
- Quantum distillation and confinement of vacancies in a doublon sea
- Motion of a distinguishable impurity in the Bose gas: Arrested expansion without a lattice and impurity snaking
- Expansion of one-dimensional lattice hard-core bosons at finite temperature
- Dynamics of Disordered States in the Bose-Hubbard Model with Confinement
- Sudden expansion and domain-wall melting of strongly interacting bosons in two-dimensional optical lattices and on multileg ladders
- Propagation of a single hole defect in the one-dimensional Bose-Hubbard model
- Expansion dynamics in two-dimensional Bose-Hubbard lattices: Bose-Einstein condensate and thermal cloud
- Efficiency of fermionic quantum distillation
- Expansion of strongly interacting dipolar bosons in 1D optical lattices