Jul 17 – 22, 2022
Royal Conservatory of Music, Toronto
America/Toronto timezone

Pattern formation in tilted optical lattices

Jul 21, 2022, 5:00 PM
1h 30m
Hart House (Hart House)

Hart House

Hart House

7 Hart House Cir, Toronto, ON M5S 3H3
Poster presentation Degenerate gases, many-body physics, and quantum simulation Poster session


Driving a many-body system out of equilibrium induces phenomena such as the emergence and decay of transient states, which can manifest itself as pattern and domain formation. The understanding of these phenomena expands the scope of established thermodynamics into the out-of-equilibrium domain. We report our theoretical and experimental study on the out-of-equilibrium dynamics of a bosonic lattice model subjected to a strong dc field, realized as ultracold atoms in a strongly tilted optical lattice. We observe the emergence of pronounced density-wave patterns, which spontaneously break the underlying lattice symmetry. The experimental observation utilizes a single-shot imaging technique with two-dimensional single-site resolution in three-dimensional systems, which also resolves the domain structure. Our study suggests that the short-time dynamics arises from resonant pair tunneling processes within an effective description of the tilted Hubbard model. More broadly, we establish the far out-of-equilibrium regime of lattice models subjected to a strong dc field, as an exemplary and paradigmatic scenario for transient pattern formation.

H. P. Zahn, V. P. Singh, M. N. Kosch, L. Asteria, L. Freystatzky, K. Sengstock, L. Mathey, and C. Weitenberg, Phys. Rev. X 12, 021014 (2022)

Spontaneous pattern formation in a tilted optical lattice

Presenter name Ludwig Mathey
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Primary authors

Ludwig Mathey Dr Vijay Singh (University of Hamburg, University of Hannover) Mr Lukas Freystatzky (University of Hamburg) Mr Henrik Zahn (University of Hamburg) Mr Marcel Kosch (University of Hamburg) Mr Luca Asteria (University of Hamburg) Prof. Klaus Sengstock (University of Hamburg) Dr Christof Weitenberg (University of Hamburg)

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