Cavity quantum electrodynamics in the nonperturbative regime

Year: 2018

Authors: De Bernardis D., Jaako T., Rabl P.

Autors Affiliation: TU Wien, Atominst, Vienna Ctr Quantum Sci & Technol, A-1040 Vienna, Austria.

Abstract: We study a generic cavity-QED system where a set of (artificial) two-level dipoles is coupled to the electric field of a single-mode LC resonator. This setup is used to derive a minimal quantum mechanical model for cavity QED, which accounts for both dipole-field and direct dipole-dipole interactions. The model is applicable for arbitrary coupling strengths and allows us to extend the usual Dicke model into the nonperturbative regime of QED, where the dipole-field interaction can be associated with an effective fine-structure constant of order unity. In this regime, we identify three distinct classes of normal, superradiant, and subradiant vacuum states and discuss their characteristic properties and the transitions between them. Our findings reconcile many of the previous, often contradictory predictions in this field and establish a common theoretical framework to describe ultrastrong-coupling phenomena in a diverse range of cavity-QED platforms.

Journal/Review: PHYSICAL REVIEW A

Volume: 97 (4)      Pages from: 43820-1  to: 43820-18

More Information: We thank Juraj Darmo, Karl Unterrainer, and Philipp Schneeweiss for many stimulating discussions and feedback on the manuscript. This work was supported by the Austrian Science Fund (FWF) through the SFB FoQuS, Grant No. F40, the DK CoQuS, Grant No. W1210, and the START Grant No. Y 591-N16.
KeyWords: Superradiant Phase-transition; 2-level Atoms; Dicke-model; Electron; Field; Molecules; Photon; Gas
DOI: 10.1103/PhysRevA.97.043820

ImpactFactor: 2.907
Citations: 108
data from “WEB OF SCIENCE” (of Thomson Reuters) are update at: 2024-11-24
References taken from IsiWeb of Knowledge: (subscribers only)

Connecting to view paper tab on IsiWeb: Click here
Connecting to view citations from IsiWeb: Click here