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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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Experiments in linear optics

Experiments in linear optics

Chapter:
(p.307) 10 Experiments in linear optics
Source:
Quantum Optics
Author(s):

J. C. Garrison

R. Y. Chiao

Publisher:
Oxford University Press
DOI:10.1093/acprof:oso/9780198508861.003.0011

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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