https://doi.org/10.1140/epjp/s13360-024-05651-9
Regular Article
Expansion of strongly interacting dipolar bosons in 1D optical lattices
1
Department of Physics, Presidency University, 86/1 College Street, 700073, Kolkata, West Bengal, India
2
Department of Physics, University of Trieste, Strada Costiera 11, 34151, Trieste, Italy
3
CNR-IOM DEMOCRITOS Simulation Centre and SISSA, Via Bonomea 265, 34136, Trieste, Italy
4
The Abdus Salam International Center for Theoretical Physics, 34100, Trieste, Italy
5
Department of Physics, University of Haifa, 3498838, Haifa, Israel
c
barnali.physics@presiuniv.ac.in
Received:
2
April
2024
Accepted:
12
September
2024
Published online:
19
September
2024
We numerically study the expansion dynamics of initially localized dipolar bosons in a homogeneous 1D optical lattice for different initial states. Comparison is made to interacting bosons with contact interaction. For shallow lattices, the expansion is unimodal and ballistic, while strong lattices suppress tunneling. However, for intermediate lattice depths, a strong interplay between dipolar interaction and lattice depth occurs. The expansion is found to be bimodal, the central cloud expansion can be distinguished from the outer halo structure. In the regime of strongly interactions dipolar bosons exhibit two time-scales, with an initial diffusion and then arrested transport in the long time, while strongly interacting bosons in the fermionized limit exhibit ballistic expansion. Our study highlights how different lattice depths and initial states can be manipulated to control tunneling dynamics.
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© The Author(s), under exclusive licence to Società Italiana di Fisica and Springer-Verlag GmbH Germany, part of Springer Nature 2024. Springer Nature or its licensor (e.g. a society or other partner) holds exclusive rights to this article under a publishing agreement with the author(s) or other rightsholder(s); author self-archiving of the accepted manuscript version of this article is solely governed by the terms of such publishing agreement and applicable law.
