Bogoliubov-Cerenkov radiation in a Bose-Einstein condensate flowing against an obstacle
Authors: Carusotto I., Hu S.X., Collins L.A., Smerzi A.
Autors Affiliation: CNR-BEC-INFM, Trento, I-38050 Povo, Italy;
Los Alamos National Laboratory, Los Alamos, New Mexico 87544, USA
Abstract: We study the density modulation that appears in a Bose-Einstein condensate flowing with supersonic velocity against an obstacle. The experimental density profiles observed at JILA are reproduced by a numerical integration of the Gross-Pitaevskii equation and then interpreted in terms of Cerenkov emission of Bogoliubov excitations by the defect. The phonon and the single-particle regions of the Bogoliubov spectrum are, respectively, responsible for a conical wave front and a fan-shaped series of precursors.
Journal/Review: PHYSICAL REVIEW LETTERS
Volume: 97 (26) Pages from: 260403-1 to: 260403-4
KeyWords: BEC; Cerenkov radiation; phononsDOI: 10.1103/PhysRevLett.97.260403Citations: 116data from “WEB OF SCIENCE” (of Thomson Reuters) are update at: 2022-11-27References taken from IsiWeb of Knowledge: (subscribers only)Connecting to view paper tab on IsiWeb: Click hereConnecting to view citations from IsiWeb: Click here