Adiabatic loading of bosons into optical lattices

TL;DR

This paper calculates entropy-temperature relationships for non-interacting bosons in optical lattices, revealing how adiabatic lattice depth changes can heat, cool, or induce reversible condensation, with discussions on interactions and non-adiabatic effects.

Contribution

It provides a detailed analysis of adiabatic processes in bosonic optical lattices, including critical points for condensation and effects of interactions, extending previous studies.

Findings

Regimes for heating and cooling via adiabatic lattice changes

Identification of critical points for Bose-Einstein condensation in lattices

Reversible condensation achievable through lattice depth manipulation

Abstract

The entropy-temperature curves are calculated for non-interacting bosons in a 3D optical lattice and a 2D lattice with transverse harmonic confinement for ranges of depths and filling factors relevant to current experiments. We demonstrate regimes where the atomic sample can be significantly heated or cooled by adiabatically changing the lattice depth. We indicate the critical points for condensation in the presence of a lattice and show that the system can be reversibly condensed by changing the lattice depth. We discuss the effects of interactions on our results and consider non-adiabatic processes.