Adiabatic loading of one-dimensional SU(N) alkaline earth fermions in optical lattices

TL;DR

This study uses quantum Monte Carlo simulations to show that adiabatically loading alkaline earth fermions into optical lattices with SU(N) symmetry results in lower temperatures for larger N, aiding the exploration of exotic magnetic states.

Contribution

It demonstrates that increasing N during adiabatic loading reduces the final temperature, facilitating access to low-temperature SU(N) magnetic phenomena in experiments.

Findings

Final temperature decreases with larger N.

Estimated temperature scales for observing SU(N) magnetism.

Supports experimental exploration of large-N magnetic states.

Abstract

Ultracold fermionic alkaline earth atoms confined in optical lattices realize Hubbard models with internal SU(N) symmetries, where N can be as large as ten. Such systems are expected to harbor exotic magnetic physics at temperatures below the superexchange energy scale. Employing quantum Monte Carlo simulations to access the low-temperature regime, we show that after adiabatically loading a weakly interacting gas into the strongly interacting regime of an optical lattice, the final temperature decreases with increasing N. Furthermore, we estimate the temperature scale required to probe correlations associated with low-temperature SU(N) magnetism. Our findings are encouraging for the exploration of exotic large-N magnetic states in ongoing experiments.