Measuring finite-range phase coherence in an optical lattice using Talbot interferometry

作者：Santra Bodhaditya; Baals Christian; Labouvie Ralf; Bhattacherjee Aranya B; Pelster Axel; Ott Herwig^*

来源：Nature Communications, 2017, 8(1): 15601.

DOI：10.1038/ncomms15601

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 us 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.

• 出版日期2017-6-5