Dipole and Bloch oscillations of cold atoms in a parabolic lattice

TL;DR

This paper investigates the dynamic behavior of Bose-Einstein condensates in a 1D parabolic optical lattice, focusing on dipole and Bloch oscillations induced by lattice shifts, and examines the effects of interactions and dephasing.

Contribution

It introduces a detailed analysis of how initial lattice shifts influence oscillation types and explores the impact of interactions and dephasing on these phenomena.

Findings

Dipole and Bloch oscillations depend on the initial lattice shift magnitude.

Atom-atom interactions affect the coherence of oscillations.

Dephasing influences the longevity of the oscillatory behavior.

Abstract

The paper studies the dynamics of a Bose-Einstein condensate loaded into a 1D parabolic optical lattice, and excited by a sudden shift of the lattice center. Depending on the magnitude of the initial shift, the condensate undergoes either dipole or Bloch oscillations. The effects of dephasing and of atom-atom interactions on these oscillations are discussed.