Transport behaviour of a Bose Einstein condensate in a bichromatic optical lattice

TL;DR

This paper investigates how a Bose Einstein condensate behaves in a bichromatic optical lattice, showing that the effective mass increase causes localization and that the secondary lattice can control atomic dynamics.

Contribution

It demonstrates the impact of a secondary optical lattice on BEC dynamics and confirms localization effects due to increased effective mass in a superlattice.

Findings

Effective mass increases in a superlattice lead to BEC localization.

Secondary lattice can be used to manipulate atomic dynamics.

Localization observed aligns with recent experimental results.

Abstract

The Bloch and dipole oscillations of a Bose Einstein condensate (BEC) in an optical superlattice is investigated. We show that the effective mass increases in an optical superlattice, which leads to localization of the BEC, in accordance with recent experimental observations [16]. In addition, we find that the secondary optical lattice is a useful additional tool to manipulate the dynamics of the atoms.