Evaporative cooling of trapped fermionic atoms

TL;DR

This paper introduces a new method for efficiently cooling trapped fermionic atoms into quantum degeneracy using electric field-induced interactions, supported by numerical studies on alkali metals and spin mixtures.

Contribution

It presents a novel evaporative cooling mechanism for fermions based on electric field-induced elastic interactions, with feasibility demonstrated through numerical simulations.

Findings

Feasible cooling of $^6$Li, $^{40}$K, and Rb isotopes

Effective sympathetic cooling of fermionic spin mixtures

Analysis of anisotropic interaction effects

Abstract

We propose an efficient mechanism for the evaporative cooling of trapped fermions directly into quantum degeneracy. Our idea is based on an electric field induced elastic interaction between trapped atoms in spin symmetric states. We discuss some novel general features of fermionic evaporative cooling and present numerical studies demonstrating the feasibility for the cooling of alkali metal fermionic species $^6$Li, $^{40}$K, and $^{82,84,86}$Rb. We also discuss the sympathetic cooling of fermionic hyperfine spin mixtures, including the effects of anisotropic interactions.