On the role of interactions in trans-sonically flowing atomic condensates
Anno: 2021
Autori: Tettamanti M., Carusotto I., Parola A.
Affiliazione autori: 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.
Giornale/Rivista: EUROPHYSICS LETTERS
Volume: 133 (2) Da Pagina: 20002-1 A: 20002-7
Parole chiavi: Hawking radiation; holeDOI: 10.1209/0295-5075/133/20002Citazioni: 4dati da “WEB OF SCIENCE” (of Thomson Reuters) aggiornati al: 2025-05-04Riferimenti 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
