On the role of interactions in trans-sonically flowing atomic condensates
Year: 2021
Authors: Tettamanti M., Carusotto I., Parola A.
Autors Affiliation: Univ Milano Bicocca, Dipartimento Fis Giuseppe Occhialini, Piazza Sci 3, I-20126 Milan, Italy; INFN, Sez Milano Bicocca, Piazza Sci 3, I-20126 Milan, Italy; Univ Trento, CNR, INO, BEC Ctr, I-38123 Povo, Italy; Univ Trento, Dipartimento Fis, I-38123 Povo, Italy; Univ Insubria, Dipartimento Sci & Alta Tecnol, Via Valleggio 11, I-22100 Como, Italy.
Abstract: We provide a joint numerical-analytical study of the physics of a flowing atomic Bose-Einstein condensate in the combined presence of an external trap and a step potential which accelerates the atoms out of the condensate creating a pair of neighbouring black- and white-hole horizons. In particular, we focus on the rapidly growing density modulation pattern that appears in the supersonic region, an experimentally observed feature that was related to black-hole lasing phenomena. A direct assessment of the role of interactions in this process suggests an interpretation of the experimental data in terms of linear interference of atomic waves rather than collective effects. Our conclusions are further supported by an analytical solution of the Schrtzdinger equation in terms of Airy wave functions.
Journal/Review: EUROPHYSICS LETTERS
Volume: 133 (2) Pages from: 20002-1 to: 20002-7
KeyWords: Hawking radiation; holeDOI: 10.1209/0295-5075/133/20002ImpactFactor: 1.958Citations: 4data from “WEB OF SCIENCE” (of Thomson Reuters) are update at: 2024-11-03References taken from IsiWeb of Knowledge: (subscribers only)Connecting to view paper tab on IsiWeb: Click hereConnecting to view citations from IsiWeb: Click here
