Density redistribution effects in fermionic optical lattices

TL;DR

This paper investigates heating in fermionic optical lattices caused by density redistribution during non-adiabatic loading, proposing modulation protocols to minimize excess energy and improve experimental outcomes.

Contribution

It introduces simulation-based analysis of density redistribution effects in fermionic lattices and proposes practical modulation protocols to reduce heating during lattice loading.

Findings

Density redistribution is the main heating mechanism in fermionic lattices.

Linear interpolation of trap potential and interaction strength effectively reduces excess energy.

Protocols are practical and applicable to current experimental setups.

Abstract

We simulate a one dimensional fermionic optical lattice to analyse heating due to non-adiabatic lattice loading. Our simulations reveal that, similar to the bosonic case, density redistribution effects are the major cause of heating in harmonic traps. We suggest protocols to modulate the local density distribution during the process of lattice loading, in order to reduce the excess energy. Our numerical results confirm that linear interpolation of the trapping potential and/or the interaction strength is an efficient method of doing so, bearing practical applications relevant to experiments.