Measuring finite-range phase coherence in an optical lattice using Talbot interferometry
Abstract
One of the important goals of present research is to control and manipulate coherence in a broad variety of systems, such as semiconductor spintronics, biological photosynthetic systems, superconducting qubits and complex atomic networks. Over the past decades interferometry of atoms and molecules has proven to be a powerful tool to explore coherence. Here we demonstrate a near-field interferometer based on the Talbot effect, which allows to measure finite-range phase coherence of ultracold atoms in an optical lattice. We apply this interferometer to study the build-up of phase coherence after a quantum quench of a Bose-Einstein condensate residing in a one-dimensional optical lattice. Our technique of measuring finite-range phase coherence is generic, easy to adopt, and can be applied in practically all lattice experiments without further modifications.
Cite
@article{arxiv.1611.08430,
title = {Measuring finite-range phase coherence in an optical lattice using Talbot interferometry},
author = {Bodhaditya Santra and Christian Baals and Ralf Labouvie and Aranya B. Bhattacherjee and Axel Pelster and Herwig Ott},
journal= {arXiv preprint arXiv:1611.08430},
year = {2017}
}