Phase transition in a radiation-matter interaction with recoil and collisions
Year: 2001
Authors: Perrin M., Lippi G.L., Politi A.
Autors Affiliation: Institut Non Linéaire de Nice, UMR 6618 CNRS-UNSA, 1361 Route des Lucioles, 06560 Valbonne, France;
Istituto Nazionale di Ottica Applicata, Largo E. Fermi 6, 50125 Firenze, Italy
Abstract: The standard model introduced to describe the collective atomic recoil of an ensemble of atoms interacting with a strong electromagnetic field has been hen extended by the inclusion of collisions with a buffer gas. As a result, we find that in the thermodynamic limit the coherent emission of radiation exhibits a continuous phase transition upon increasing the pump intensity. The output laser field is strictly larger than 0 only above a critical value. We find that the transition is not associated with the onset of spatial ordering but rather with the onset of a synchronization between the polarization phase and spatial position. A coherence parameter is introduced to characterize the phase transition.
Journal/Review: PHYSICAL REVIEW LETTERS
Volume: 86 (20) Pages from: 4520 to: 4523
KeyWords: Collective Atomic Recoil; 2-level Atoms; Laser; Amplification; Vapor; Gain; GratingsDOI: 10.1103/PhysRevLett.86.4520ImpactFactor: 6.668Citations: 16data from “WEB OF SCIENCE” (of Thomson Reuters) are update at: 2024-10-06References taken from IsiWeb of Knowledge: (subscribers only)Connecting to view paper tab on IsiWeb: Click hereConnecting to view citations from IsiWeb: Click here