Experimental realization of fragmented models in tilted Fermi-Hubbard chains

Understand

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.