Phase transition in a radiation-matter interaction with recoil and collisions
Anno: 2001
Autori: Perrin M., Lippi G.L., Politi A.
Affiliazione autori: 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.
Giornale/Rivista: PHYSICAL REVIEW LETTERS
Volume: 86 (20) Da Pagina: 4520 A: 4523
Parole chiavi: Collective Atomic Recoil; 2-level Atoms; Laser; Amplification; Vapor; Gain; GratingsDOI: 10.1103/PhysRevLett.86.4520Citazioni: 16dati da “WEB OF SCIENCE” (of Thomson Reuters) aggiornati al: 2025-05-18Riferimenti tratti da Isi Web of Knowledge: (solo abbonati) Link per visualizzare la scheda su IsiWeb: Clicca quiLink per visualizzare la citazioni su IsiWeb: Clicca qui
