Open AccessNoise squeezing of fields that bichromatically excite atoms in a cavity
Author(s) -
Lingchao Li,
Xiangming Hu,
Shi Rao,
Jun Xu
Publication year - 2016
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.24.026536
Subject(s) - physics , dissipative system , excitation , atomic physics , photon , dissipation , noise (video) , atom (system on chip) , field (mathematics) , amplitude , cascade , cavity quantum electrodynamics , quantum , quantum noise , quantum mechanics , chemistry , mathematics , chromatography , artificial intelligence , computer science , open quantum system , pure mathematics , image (mathematics) , embedded system
It is well known that bichromatic excitation on one common transition can tune the emission or absorption spectra of atoms due to the modulation frequency dependent non-linearities. However little attention has been focused on the quantum dynamics of fields under bichromatic excitation. Here we present dissipative effects on noise correlations of fields in bichromatic interactions with atoms in cavities. We first consider an ensemble of two-level atoms that interacts with the two cavity fields of different frequencies and considerable amplitudes. By transferring the atom-field nonlinearities to the dressed atoms we separate out the dissipative interactions of Bogoliubov modes with the dressed atoms. The Bogoliubov mode dissipation establishes stable two-photon processes of two involved fields and therefore leads to two-mode squeezing. As a generalization, we then consider an ensemble of three-level Λ atoms for cascade bichromatic interactions. We extract the Bogoliubov-like four-mode interactions, which establish a quadrilateral of the two-photon processes of four involved fields and thus result in four-mode squeezing.