Self-trapping in the two-dimensional Bose-Hubbard model

Andrew Jreissaty, Juan Carrasquilla, Marcos Rigol

Research output: Contribution to journalArticlepeer-review

11 Scopus citations


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.

Original languageEnglish (US)
Article number031606
JournalPhysical Review A - Atomic, Molecular, and Optical Physics
Issue number3
StatePublished - Sep 30 2013

All Science Journal Classification (ASJC) codes

  • Atomic and Molecular Physics, and Optics


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