Title

Linear optics and projective measurements for fun and profit

Document Type

Conference Proceeding

Publication Date

9-19-2003

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.

Publication Source (Journal or Book title)

Proceedings of SPIE - The International Society for Optical Engineering

First Page

298

Last Page

307

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