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

Author

Listed:
  • Bodhaditya Santra

    (Technische Universität Kaiserslautern)

  • Christian Baals

    (Technische Universität Kaiserslautern
    Graduate School Materials Science in Mainz)

  • Ralf Labouvie

    (Technische Universität Kaiserslautern
    Graduate School Materials Science in Mainz)

  • Aranya B. Bhattacherjee

    (School of Physical Sciences, Jawaharlal Nehru University)

  • Axel Pelster

    (Technische Universität Kaiserslautern)

  • Herwig Ott

    (Technische Universität Kaiserslautern)

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.

Suggested Citation

  • Bodhaditya Santra & Christian Baals & Ralf Labouvie & Aranya B. Bhattacherjee & Axel Pelster & Herwig Ott, 2017. "Measuring finite-range phase coherence in an optical lattice using Talbot interferometry," Nature Communications, Nature, vol. 8(1), pages 1-8, August.
    • Handle: RePEc:nat:natcom:v:8:y:2017:i:1:d:10.1038_ncomms15601
    DOI: 10.1038/ncomms15601
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