Journal
PHYSICAL REVIEW LETTERS
Volume 131, Issue 4, Pages -Publisher
AMER PHYSICAL SOC
DOI: 10.1103/PhysRevLett.131.043403
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We study Fermi-Hubbard models with kinetically constrained dynamics in strongly tilted optical lattices, where interacting fermions are placed. Through analytics and numerics, we demonstrate how the kinetic constraints stabilize an exotic non-Fermi liquid phase described by fermions coupled to a gapless bosonic field that behaves like a dynamical gauge field in several aspects. This provides a novel approach to studying non-Fermi liquid phases in precision environments offered by ultracold atom platforms.
We study Fermi-Hubbard models with kinetically constrained dynamics that conserves both total particle number and total center of mass, a situation that arises when interacting fermions are placed in strongly tilted optical lattices. Through a combination of analytics and numerics, we show how the kinetic constraints stabilize an exotic non-Fermi liquid phase described by fermions coupled to a gapless bosonic field, which in several respects mimics a dynamical gauge field. This offers a novel route towards the study of non-Fermi liquid phases in the precision environments afforded by ultracold atom platforms.
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