Faraday quantum clock and nonlocal photon pair correlations

Y. Japha and G. Kurizki
Phys. Rev. A 60, 1811 – Published 1 September 1999
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Abstract

We study the use of the Faraday effect as a quantum clock for measuring traversal times of evanescent photons through magnetorefractive structures. The Faraday effect acts both as a phase shifter and as a filter for circular polarizations. Only measurements based on the Faraday phase-shift properties are relevant to the traversal time measurements. The Faraday polarization filtering may cause the loss of nonlocal (Einstein-Podolsky-Rosen) two-photon correlations, but this loss can be avoided without sacrificing the clock accuracy. We show that a mechanism of destructive interference between consecutive paths is responsible for superluminal traversal times measured by the clock.

  • Received 24 February 1999

DOI:https://doi.org/10.1103/PhysRevA.60.1811

©1999 American Physical Society

Authors & Affiliations

Y. Japha* and G. Kurizki

  • Department of Chemical Physics, The Weizmann Institute of Science, Rehovot 76100, Israel

  • *Present address: Clarendon Laboratory, Department of Physics, University of Oxford, Oxford, OX1 3PU,UK.

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Vol. 60, Iss. 3 — September 1999

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