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Updated: Aug 14, 2026

Cooling an Optically Trapped Ultracold Fermi Gas by Periodical Driving
Published on: March 30, 2017
Exponentially decaying correlations in a gas of strongly interacting spin-polarized 1D fermions with zero-range
Scott A Bender1, Kevin D Erker, Brian E Granger
1Department of Physics, Santa Clara University, Santa Clara, California 95053, USA.
Abstract:
We consider the single-particle correlations and momentum distributions in a gas of strongly interacting, spinless 1D fermions with zero-range interactions. This system represents a fermionic version of the Tonks-Girardeau gas of impenetrable bosons as it can be mapped to a system of noninteracting 1D bosons. We use this duality to show that the T = 0, single-particle correlations exhibit an exponential decay with distance. This strongly interacting system is experimentally accessible using ultracold atoms and has a Lorentzian momentum distribution at large momenta whose width is given by the linear density.
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