High-efficiency quantum interrogation measurements via the quantum zeno effect

P. G. Kwiat; A. G. White; J. R. Mitchell; O. Nairz; G. Weihs; H. Weinfurter; A. Zeilinger

doi:10.1103/PhysRevLett.83.4725

High-efficiency quantum interrogation measurements via the quantum zeno effect

P. G. Kwiat, A. G. White, J. R. Mitchell, O. Nairz, G. Weihs, H. Weinfurter, A. Zeilinger

Research output: Contribution to journal › Article › peer-review

Abstract

The phenomenon of quantum interrogation allows one to optically detect the presence of an absorbing object, without the measuring light interacting with it. In an application of the quantum Zeno effect, the object inhibits the otherwise coherent evolution of the light, such that the probability that an interrogating photon is absorbed can in principle be arbitrarily small. We have implemented this technique, achieving efficiencies of up to 73%, and consequently exceeding the 50% theoretical maximum of the original “interaction-free” measurement proposal. We have also predicted and experimentally verified a previously unsuspected dependence on loss. 1999

Original language	English (US)
Pages (from-to)	4725-4728
Number of pages	4
Journal	Physical review letters
Volume	83
Issue number	15
DOIs	https://doi.org/10.1103/PhysRevLett.83.4725
State	Published - 1999
Externally published	Yes

ASJC Scopus subject areas

Physics and Astronomy(all)

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AU - Weinfurter, H.

AU - Zeilinger, A.

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AB - The phenomenon of quantum interrogation allows one to optically detect the presence of an absorbing object, without the measuring light interacting with it. In an application of the quantum Zeno effect, the object inhibits the otherwise coherent evolution of the light, such that the probability that an interrogating photon is absorbed can in principle be arbitrarily small. We have implemented this technique, achieving efficiencies of up to 73%, and consequently exceeding the 50% theoretical maximum of the original “interaction-free” measurement proposal. We have also predicted and experimentally verified a previously unsuspected dependence on loss. 1999

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High-efficiency quantum interrogation measurements via the quantum zeno effect

Abstract

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