Experimental realization of fragmented models in tilted Fermi-Hubbard chains

Abstract

Quantum many-body systems may defy thermalization even without disorder. Intriguingly, non-ergodicity may be caused by a fragmentation of the many-body Hilbert-space into dynamically disconnected subspaces. The tilted one-dimensional Fermi-Hubbard model was proposed as a platform to realize fragmented models perturbatively in the limit of large tilt. Here, we demonstrate the validity of this effective description for the transient dynamics using ultracold fermions. The effective analytic model allows for a detailed understanding of the emergent microscopic processes, which in our case exhibit a pronounced doublon-number dependence. We study this experimentally by tuning the doublon fraction in the initial state.

Cited by in corpus (10)

• Quantum Many-Body Scars and Hilbert Space Fragmentation: A Review of Exact Results
• Dynamical phase transitions in the collisionless pre-thermal states of isolated quantum systems: theory and experiments
• The dipolar Bose-Hubbard model
• Emergence of Hilbert Space Fragmentation in Ising Models with a Weak Transverse Field
• Hidden quasiconservation laws in fracton hydrodynamics
• Single-Particle Mobility Edge without Disorder
• Absence of heating in a uniform Fermi gas created by periodic driving
• Bound state dynamics in the long-range spin-$\frac{1}{2}$ XXZ model
• Tunable transport in the mass-imbalanced Fermi-Hubbard model
• Approximating quantum thermodynamic properties using DFT