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Expansion dynamics of interacting bosons and fermions in one dimensional optical lattices

Fabian Heidrich‐Meisner

Bulletin of the American Physical SocietyJun 4, 20130 citations

Expansion of strongly interacting dipolar bosons in 1D optical lattices

Rhombik Roy, Andrea Trombettoni, Barnali Chakrabarti

arXiv:2403.10862The European Physical Journal PlusSep 19, 20245 citations

Dynamics of interacting bosons in an optical lattice

Anatoli Polkovnikov, Subir Sachdev A, S. M. Girvin

APSMar 1, 20030 citations

Expansion Dynamics of Interacting Bosons in Homogeneous Lattices in One and Two Dimensions

J. P. Ronzheimer, Michael Schreiber, S. Braun +6 more

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.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.

arXiv:1301.5329Physical Review LettersMay 13, 2013301 citations

Lattice Models for the Quantum Dynamics of Identical Bosons

Kaspar Sakmann

Springer eBooksJan 1, 20110 citations

Nonequilibrium Mass Transport in the 1D Fermi-Hubbard Model

Sebastian Scherg, Thomas Kohlert, J. Herbrych +6 more

We experimentally and numerically investigate the sudden expansion of fermions in a homogeneous one-dimensional optical lattice. For initial states with an appreciable amount of doublons, we observe a dynamical phase separation between rapidly expanding singlons and slow doublons remaining in the trap center, realizing the key aspect of fermionic quantum distillation in the strongly interacting limit. For initial states without doublons, we find a reduced interaction dependence of the asymptotic expansion speed compared to bosons, which is explained by the interaction energy produced in the quench.We experimentally and numerically investigate the sudden expansion of fermions in a homogeneous one-dimensional optical lattice. For initial states with an appreciable amount of doublons, we observe a dynamical phase separation between rapidly expanding singlons and slow doublons remaining in the trap center, realizing the key aspect of fermionic quantum distillation in the strongly interacting limit. For initial states without doublons, we find a reduced interaction dependence of the asymptotic expansion speed compared to bosons, which is explained by the interaction energy produced in the quench.

arXiv:1805.10990Physical Review LettersSep 25, 201857 citations

Expansion dynamics of interacting bosons in homogeneous lattices

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