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Linear optics and projective measurements for fun and profit
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Paper Abstract

The technique of projective measurements in linear optics can provide apparent, efficient nonlinear interaction between photons, which is technically problematic otherwise. We present an application of such a technique to prepare large photon-number path entanglement. Large photon-number path entanglement is an important resource for Heisenberg-limited optical interferometry, where the sensitivity of phase measurements can be improved beyond the usual shot-noise limit. A similar technique can also be applied to signal the presence of a single photon without destroying it. We further show how to build a quantum repeater for long-distance quantum communication.

Paper Details

Date Published: 8 May 2003
PDF: 10 pages
Proc. SPIE 5115, Noise and Information in Nanoelectronics, Sensors, and Standards, (8 May 2003); doi: 10.1117/12.502402
Show Author Affiliations
Pieter Kok, Jet Propulsion Lab. (United States)
Hwang Lee, Jet Propulsion Lab. (United States)
Colin P. Williams, Jet Propulsion Lab. (United States)
Jonathan P. Dowling, Jet Propulsion Lab. (United States)

Published in SPIE Proceedings Vol. 5115:
Noise and Information in Nanoelectronics, Sensors, and Standards
Laszlo B. Kish; Frederick Green; Giuseppe Iannaccone; John R. Vig, Editor(s)

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