`Interaction-free' quantum measurements

Andrew G. White, Paul G. Kwiat, Olaf Nairz, Gregor Weihs, Anton Zeilinger

Research output: Contribution to conferencePaper


`Interaction-free' measurements (IFM) of the presence of an object with no photons being adsorbed are feasible with an efficiency of >85% by using an application of the quantum zeno effect. For photons that leave on the desired cycle (N = 6), the polarization is found to be horizontal in the absence of an object, and vertical with the object present. Polarimeter cavity is used to demonstrate high-efficiency interaction-free measurements and the Mach-Zehnder polarimeter is used to obtain interaction-free images.

Original languageEnglish (US)
Number of pages2
StatePublished - Jan 1 1998
Externally publishedYes
EventProceedings of the 1998 International Quantum Electronics Conference - San Francisco, CA, USA
Duration: May 3 1998May 8 1998


OtherProceedings of the 1998 International Quantum Electronics Conference
CitySan Francisco, CA, USA

ASJC Scopus subject areas

  • Physics and Astronomy(all)

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    White, A. G., Kwiat, P. G., Nairz, O., Weihs, G., & Zeilinger, A. (1998). `Interaction-free' quantum measurements. 21-22. Paper presented at Proceedings of the 1998 International Quantum Electronics Conference, San Francisco, CA, USA, .