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Journal article 588 views

Near-field interferometry of a free-falling nanoparticle from a point-like source / James Bateman; Stefan Nimmrichter; Klaus Hornberger; Hendrik Ulbricht

Nature Communications, Volume: 5, Start page: 4788

Swansea University Author: James, Bateman

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DOI (Published version): 10.1038/ncomms5788

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...

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Published in: Nature Communications
Published: 2014
URI: https://cronfa.swan.ac.uk/Record/cronfa28698
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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 more than 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.
College: College of Science
Start Page: 4788