Open AccessPhoton squeezing of the Rabi model
Author(s) -
Lu Yu,
Qifeng Liang,
Lirong Wang,
Shiqun Zhu
Publication year - 2013
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.62.160301
Subject(s) - physics , rabi frequency , photon , rabi cycle , cavity quantum electrodynamics , coupling (piping) , rotating wave approximation , jaynes–cummings model , atom (system on chip) , quantum electrodynamics , quantum mechanics , coupling strength , atomic physics , quantum , open quantum system , condensed matter physics , laser , mechanical engineering , computer science , engineering , embedded system
Recent experiments about the circuit cavity quantum electrodynamics have realized the ultrastrong couplings between the artificial atom and the photon, in which the coupling strengths have the same order of the photon frequency. In such a regime, the well-known rotating wave approximation is invalid, and the system dynamics is thus governed by the Rabi model. In this paper, we investigate the photon squeezing of the Rabi model. We find numerically that with the increase of the atom-photon coupling strength, the photon squeezing does not increase linearly, but displays a maximum in the ultrastrong coupling regime. In addition, we also reveal that the photonsqueezing can be enhanced by the counter-rotating terms of the Rabi model. Our results are of benefit to preparing the required squeezing state of the photon in experiment.