Open AccessQuantum nondemolition measurement of photon number via optical Kerr effect in an ultra-high-Q microtoroid cavity
Author(s) -
YunFeng Xiao,
Şahin Kaya Özdemir,
Venkat Gaddam,
Chun Hua Dong,
Nobuyuki Imoto,
Lan Yang
Publication year - 2008
Publication title -
optics express
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.394
H-Index - 271
ISSN - 1094-4087
DOI - 10.1364/oe.16.021462
Subject(s) - physics , photon , quantum optics , optics , kerr effect , quantum , cavity quantum electrodynamics , quantum sensor , quantum metrology , quantum mechanics , nonlinear system , quantum information , quantum network , open quantum system
We theoretically investigate a quantum nondemolition (QND) measurement with optical Kerr effect in an ultra-high-Q microtoroidal system. The analytical and numerical results predict that the present QND measurement scheme possesses a high sensitivity, which allows for detecting few photons or even single photons. Ultra-high-Q toroidal microcavity may provide a novel experimental platform to study quantum physics with nonlinear optics at low light levels.