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Quantum Optics$
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John Garrison and Raymond Chiao

Print publication date: 2008

Print ISBN-13: 9780198508861

Published to Oxford Scholarship Online: September 2008

DOI: 10.1093/acprof:oso/9780198508861.001.0001

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PRINTED FROM OXFORD SCHOLARSHIP ONLINE (oxford.universitypressscholarship.com). (c) Copyright Oxford University Press, 2021. All Rights Reserved. An individual user may print out a PDF of a single chapter of a monograph in OSO for personal use. date: 22 October 2021

Experiments in linear optics

Experiments in linear optics

(p.307) 10 Experiments in linear optics
Quantum Optics

J. C. Garrison

R. Y. Chiao

Oxford University Press

This chapter presents experiments employing the optical devices described in Chapter 8 and the detection schemes discussed in Chapter 9. Single-photon interference — described by a first-order correlation function — is destroyed by measurements yielding “which-path” information. The Hanbury Brown-Twiss effect is described by a second-order (intensity-intensity) correlation function. Two-photon interference is observed with the Hong-Ou-Mandel (HOM) interferometer, in which a pair of photons interfere at a single beam splitter. In the Franson interferometer, the interference occurs between photons at spatially separated beam splitters. The HOM effect is used to measure the propagation speed of a single photon in a dielectric medium and the tunneling speed across an optical barrier. Similar techniques show that the mere possibility of observing which-path information destroys single-photon interference, even if no measurements are actually made.

Keywords:   single-photon interference, which-path information, Hanbury Brown-Twiss effect, two-photon interference, Hong-Ou-Mandel interferometer, Franson interferometer, propagation speed, tunneling

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