Fermionic Atoms in Optical Superlattices

TL;DR

This paper explores how fermionic atoms in optical superlattices can simulate a unique Anderson lattice model, revealing how the Kondo effect and magnetism compete depending on particle number parity, with observable Kondo resonances.

Contribution

It introduces a novel realization of an Anderson lattice model using optical superlattices and analyzes the competition between Kondo effect and magnetism in this setting.

Findings

Kondo effect can dominate over magnetism depending on particle parity.

Kondo-induced resonances are observable through atomic interference patterns.

Finite-size effects significantly influence the interplay between Kondo physics and magnetism.

Abstract

Fermionic atoms in an optical superlattice can realize a very peculiar Anderson lattice model in which impurities interact with each other through a discretized set of delocalized levels. We investigate the interplay between Kondo effect and magnetism under these finite-size features. We find that Kondo effect can dominate over magnetism depending on the parity of the number of particles per discretized set. We show how Kondo-induced resonances of measurable size can be observed through the atomic interference pattern.