Manipulating matter waves in an optical superlattice

TL;DR

This paper explores controlling matter waves in a one-dimensional optical superlattice using Bloch oscillations and dynamic lattice parameters, enabling advanced quantum state preparation.

Contribution

It introduces a novel control method combining lattice acceleration and parameter tuning for manipulating Bose-Einstein condensates in superlattices.

Findings

Achieved wide control over energy band populations.

Demonstrated quantum state preparation techniques.

Applicable to low and high potential depths.

Abstract

We investigate the potential for controlling a non-interacting Bose-Einstein condensate loaded into a one-dimensional optical superlattice. Our control strategy combines Bloch oscillations originating from accelerating the lattice and from time-dependent control of the superlattice parameters. We investigate two experimentally viable scenarios, very low and very high potential depths. We are able to exhibit a wide range of control over energy band populations using the superlattice control parameters. With this analysis we consider several examples of quantum state preparation in the superlattice structure that may be difficult to achieve in a regular lattice.