Expansion Dynamics of Interacting Bosons in Homogeneous Lattices in One and Two Dimensions
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Open Access
- 13 May 2013
- journal article
- research article
- Published by American Physical Society (APS) in Physical Review Letters
- Vol. 110 (20), 205301
- https://doi.org/10.1103/physrevlett.110.205301
Abstract
We experimentally and numerically investigate the expansion of initially localized ultracold bosons in homogeneous one- and two-dimensional optical lattices. We find that both dimensionality and interaction strength crucially influence these nonequilibrium dynamics. While the atoms expand ballistically in all integrable limits, deviations from these limits dramatically suppress the expansion and lead to the appearance of almost bimodal cloud shapes, indicating diffusive dynamics in the center surrounded by ballistic wings. For strongly interacting bosons, we observe a dimensional crossover of the dynamics from ballistic in the one-dimensional hard-core case to diffusive in two dimensions, as well as a similar crossover when higher occupancies are introduced into the system.Keywords
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This publication has 43 references indexed in Scilit:
- Probing the relaxation towards equilibrium in an isolated strongly correlated one-dimensional Bose gasNature Physics, 2012
- Colloquium: Nonequilibrium dynamics of closed interacting quantum systemsReviews of Modern Physics, 2011
- Quantum Quench of an Atomic Mott InsulatorPhysical Review Letters, 2011
- Many-body physics with ultracold gasesReviews of Modern Physics, 2008
- Interaction-Controlled Transport of an Ultracold Fermi GasPhysical Review Letters, 2007
- Spontaneous symmetry breaking in a quenched ferromagnetic spinor Bose–Einstein condensateNature, 2006
- A quantum Newton's cradleNature, 2006
- Strongly Inhibited Transport of a Degenerate 1D Bose Gas in a LatticePhysical Review Letters, 2005
- Collisionally Induced Transport in Periodic PotentialsPhysical Review Letters, 2004
- Collapse and revival of the matter wave field of a Bose–Einstein condensateNature, 2002