University of Birmingham > Talks@bham > Theoretical Physics Seminars > Exploring non-equilibrium dynamics in novel Fermi gas systems

Exploring non-equilibrium dynamics in novel Fermi gas systems

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If you have a question about this talk, please contact Dr Hannah Price.

In recent years, the thermalization of quantum systems has been the subject of intense study. Particularly interesting are systems which exhibit slow or completely arrested thermalization, with many-body localized systems being a prime example of the latter. Recent theoretical work has identified Hilbert space fragmentation in clean, kinetically-constrained systems as another mechanism for the breakdown of ergodicity in many-body quantum systems. Motivated by engineering such systems with ultracold atoms, I will discuss two recent experiments we have performed. In the first, we studied tilted Fermi-Hubbard systems and discovered a slow thermalization mechanism due to an interplay of charge and heat transport. Modified versions of this system may be used to explore prethermal Hamiltonians with a fragmented Hilbert space. In the second experiment, we studied the short-time quench dynamics of charge-density wave states in a spinless fermionic lattice gas with off-site interactions realized with Rydberg-dressing. We again observed a slowdown of the dynamics for strong, off-site interactions. We discuss connections of this experiment to theoretical work on fragmentation in t-V models.

This talk is part of the Theoretical Physics Seminars series.

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