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Near-field interferometry of a free-falling nanoparticle from a point-like source

Author

Listed:
  • James Bateman

    (Physics and Astronomy, University of Southampton)

  • Stefan Nimmrichter

    (Fakultät für Physik, Universität Duisburg-Essen)

  • Klaus Hornberger

    (Fakultät für Physik, Universität Duisburg-Essen)

  • Hendrik Ulbricht

    (Physics and Astronomy, University of Southampton)

Abstract

Matter-wave interferometry performed with massive objects elucidates their wave nature and thus tests the quantum superposition principle at large scales. Whereas standard quantum theory places no limit on particle size, alternative, yet untested theories—conceived to explain the apparent quantum to classical transition—forbid macroscopic superpositions. Here we propose an interferometer with a levitated, optically cooled and then free-falling silicon nanoparticle in the mass range of one million atomic mass units, delocalized over >150 nm. The scheme employs the near-field Talbot effect with a single standing-wave laser pulse as a phase grating. Our analysis, which accounts for all relevant sources of decoherence, indicates that this is a viable route towards macroscopic high-mass superpositions using available technology.

Suggested Citation

  • James Bateman & Stefan Nimmrichter & Klaus Hornberger & Hendrik Ulbricht, 2014. "Near-field interferometry of a free-falling nanoparticle from a point-like source," Nature Communications, Nature, vol. 5(1), pages 1-5, December.
    • Handle: RePEc:nat:natcom:v:5:y:2014:i:1:d:10.1038_ncomms5788
    DOI: 10.1038/ncomms5788
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