Ultracold atoms in superlattices as quantum simulators for a spin ordering model and phenomena

TL;DR

This paper proposes using ultracold fermionic atoms in optical superlattices to simulate complex quantum spin models, including superexchange interactions and RVB states, aiding the understanding of magnetic frustration and high-temperature superconductivity.

Contribution

It introduces a theoretical framework for simulating spin ordering models with ultracold atoms in superlattices, connecting atomic physics with condensed matter phenomena.

Findings

Demonstrates superexchange interactions in double well potentials.

Shows potential for simulating resonating valence bond states in kagome lattices.

Provides a pathway for quantum simulation of magnetic frustrated systems.

Abstract

Cold atoms in optical lattices is the application of two formerly distinct aspects of physics: quantum gases from atomic physics and laser theory from quantum optics. Its use to simulate quantum phenomena and models in condensed matter physics is a growing field. The major goal is to use cold fermonic atoms in these superlattices for the simulations. We present here a theoretical proposal for simulating a spin ordering model using fermions. We demonstrate superexchange interaction in the double well and resonating valence bond (RVB) states in kagome lattice which is important for understanding the CuO2 plane of the superconducting cuprates and other magnetic frustrated materials.