Open AccessREDUCTION OF QUANTUM NOISE BY PHOTON CORRELATION
Author(s) -
Yongqing Li,
Yuzhu Wang
Publication year - 1989
Publication title -
wuli xuebao
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.199
H-Index - 47
ISSN - 1000-3290
DOI - 10.7498/aps.38.476
Subject(s) - physics , nonclassical light , shot noise , quantum noise , photon , quantum limit , quantum mechanics , noise (video) , quantum , squeezed coherent state , quantum electrodynamics , optics , coherent states , image (mathematics) , artificial intelligence , detector , computer science
In this paper, the quantum theory of the measurement of the intensity difference between two light beams is analysed. The quantum noise can be reduced by increasing the photon correlation between two beams. For anti-Cauchy-Schwarz light, another type of nonclassical radiation fields, this quantum noise can be reduced to a level below the classical limit. The sub-shot noise may occur in DFWM between the conjugate wave and the transmit wave.