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

Bodhaditya Santra, Christian Baals, Ralf Labouvie, Aranya B. Bhattacherjee, Axel Pelster and Herwig Ott ()
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Bodhaditya Santra: Technische Universität Kaiserslautern
Christian Baals: Technische Universität Kaiserslautern
Ralf Labouvie: Technische Universität Kaiserslautern
Aranya B. Bhattacherjee: School of Physical Sciences, Jawaharlal Nehru University
Axel Pelster: Technische Universität Kaiserslautern
Herwig Ott: Technische Universität Kaiserslautern

Nature Communications, 2017, vol. 8, issue 1, 1-8

Abstract: 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 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.

Date: 2017
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Persistent link: https://EconPapers.repec.org/RePEc:nat:natcom:v:8:y:2017:i:1:d:10.1038_ncomms15601

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DOI: 10.1038/ncomms15601

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