From Linear Optical Quantum Computing to Heisenberg-Limited Interferometry
摘要
The working principles of linear optical quantum computing are based on photodetection, namely, projective measurements. The use of photodetection can provide efficient nonlinear interactions between photons at the single-photon level, which is technically problematic otherwise. We report an application of such a technique to prepare quantum correlations as an important resource for Heisenberg-limited optical interferometry, where the sensitivity of phase measurements can be improved beyond the usual shot-noise limit. Furthermore, using such nonlinearities, optical quantum nondemolition measurements can now be carried out at the single-photon level.
引用
@article{arxiv.quant-ph/0312169,
title = {From Linear Optical Quantum Computing to Heisenberg-Limited Interferometry},
author = {Hwang Lee and Pieter Kok and Colin P. Williams and Jonathan P. Dowling},
journal= {arXiv preprint arXiv:quant-ph/0312169},
year = {2010}
}
备注
10 pages, 5 figures; Submitted to a Special Issue of J. Opt. B on "Fluctuations and Noise in Photonics and Quantum Optics" (Herman Haus Memorial Issue); v2: minor changes