Quantum nondemolition measurement of photon number via optical Kerr effect in an ultra-high-Q microtoroid cavity.
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.
Xiao
Yun-Feng
YF
Department of Electrical and Systems Engineering, Washington University in St. Louis, St. Louis, MO 63130, USA. yfxiao@ese.wustl.edu
Ozdemir
Sahin Kaya
SK
Gaddam
Venkat
V
Dong
Chun-Hua
CH
Imoto
Nobuyuki
N
Yang
Lan
L