Non-Fermi Liquids from Kinetic Constraints in Tilted Optical Lattices

Here 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...

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Bibliographic Details
Published in:Physical review letters 2023-07, Vol.131 (4)
Main Authors: Lake, Ethan, Senthil, T.
Format: Article
Language:English
Subjects:
Cold gases in optical lattices
Physics
PHYSICS OF ELEMENTARY PARTICLES AND FIELDS
Synthetic gauge fields
Online Access:Get full text
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Summary:Here 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.
ISSN:0031-9007