Interaction-free measurements by quantum Zeno stabilization of ultracold atoms

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Peise, J.; Luecke, B.; Pezze, L.; Deuretzbacher, F.; Ertmer, W. et al.: Interaction-free measurements by quantum Zeno stabilization of ultracold atoms. In: Nature Communications 6 (2015) , 6811. DOI:

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Sum total of downloads: 158

Quantum mechanics predicts that our physical reality is influenced by events that can potentially happen but factually do not occur. Interaction-free measurements (IFMs) exploit this counterintuitive influence to detect the presence of an object without requiring any interaction with it. Here we propose and realize an IFM concept based on an unstable many-particle system. In our experiments, we employ an ultracold gas in an unstable spin configuration, which can undergo a rapid decay. The object-realized by a laser beam-prevents this decay because of the indirect quantum Zeno effect and thus, its presence can be detected without interacting with a single atom. Contrary to existing proposals, our IFM does not require single-particle sources and is only weakly affected by losses and decoherence. We demonstrate confidence levels of 90%, well beyond previous optical experiments.
License of this version: CC BY 4.0 Unported
Document Type: Article
Publishing status: publishedVersion
Issue Date: 2015-04
Appears in Collections:Fakultät für Mathematik und Physik

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pos. country downloads
total perc.
1 image of flag of Germany Germany 122 77.22%
2 image of flag of United States United States 21 13.29%
3 image of flag of China China 8 5.06%
4 image of flag of No geo information available No geo information available 1 0.63%
5 image of flag of Taiwan Taiwan 1 0.63%
6 image of flag of Italy Italy 1 0.63%
7 image of flag of Hungary Hungary 1 0.63%
8 image of flag of France France 1 0.63%
9 image of flag of Canada Canada 1 0.63%
10 image of flag of Brazil Brazil 1 0.63%

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