Linear optics and projective measurements for fun and profit

Pieter Kok; Hwang Lee; Colin P. Williams; Jonathan P. Dowling

doi:10.1117/12.502402

8 May 2003 Linear optics with projective measurements for fun and profit

Pieter Kok, Hwang Lee, Colin P. Williams, Jonathan P. Dowling

Proceedings Volume 5115, Noise and Information in Nanoelectronics, Sensors, and Standards; (2003) https://doi.org/10.1117/12.502402
Event: SPIE's First International Symposium on Fluctuations and Noise, 2003, Santa Fe, New Mexico, United States

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.

Citation Download Citation

Pieter Kok, Hwang Lee, Colin P. Williams, and Jonathan P. Dowling "Linear optics with projective measurements for fun and profit", Proc. SPIE 5115, Noise and Information in Nanoelectronics, Sensors, and Standards, (8 May 2003); https://doi.org/10.1117/12.502402

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