Tunneling-induced damping of phase coherence revivals in deep optical lattices

TL;DR

This paper investigates how tunneling between sites in deep optical lattices causes damping of phase coherence revivals, providing scaling laws to predict and interpret experimental observations.

Contribution

It introduces a theoretical framework within the Bose-Hubbard model to quantify tunneling-induced damping of coherence revivals in deep optical lattices.

Findings

Derived scaling laws for revival damping

Estimated experimental observability of tunneling effects

Analyzed dependence on lattice parameters and filling factor

Abstract

We consider phase coherence collapse and revival in deep optical lattices, and calculate within the Bose-Hubbard model the revival amplitude damping incurred by a finite tunneling coupling of the lattice wells (after sweeping from the superfluid to the Mott phase). Deriving scaling laws for the corresponding decay of first-order coherence revival in terms of filling factor, final lattice depth, and number of tunneling coupling partners, we estimate whether revival-damping related to tunneling between sites can be or even has already been observed in experiment.