Journal of Physics B Atomic Molecular and Optical Physics

High-efficiency interaction-free measurements using a stabilized Fabry–Pérot cavity

Naoto Namekata, Shuichiro Inoue

Published Jul 28, 2006• 8 citations

Abstract

Using a Fabry–Perot cavity with high transmittivity, we have realized high-efficiency interaction-free measurements. The required stability of the cavity was achieved by employing the Pound-Drever feedback scheme without disturbing the measurement. For both an absorbing and a transparent object, the probability of correctly determining the presence or absence of the object (the efficiency of the interaction-free measurement) was found to be 88%.

DOI: 10.1088/0953-4075/39/16/003

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