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.
journal_name
Nat Communjournal_title
Nature communicationsauthors
Bateman J,Nimmrichter S,Hornberger K,Ulbricht Hdoi
10.1038/ncomms5788subject
Has Abstractpub_date
2014-09-02 00:00:00pages
4788issn
2041-1723pii
ncomms5788journal_volume
5pub_type
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