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 Schrodinger equation in terms of Airy wave functions. Copyright (C) 2021 EPLA

On the role of interactions in trans-sonically flowing atomic condensates / Tettamanti, M; Carusotto, I; Parola, A. - In: EUROPHYSICS LETTERS. - ISSN 0295-5075. - 133:2(2021). [10.1209/0295-5075/133/20002]

On the role of interactions in trans-sonically flowing atomic condensates

Carusotto I;
2021

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 Schrodinger equation in terms of Airy wave functions. Copyright (C) 2021 EPLA
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Tettamanti, M; Carusotto, I; Parola, A
On the role of interactions in trans-sonically flowing atomic condensates / Tettamanti, M; Carusotto, I; Parola, A. - In: EUROPHYSICS LETTERS. - ISSN 0295-5075. - 133:2(2021). [10.1209/0295-5075/133/20002]
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11572/343914
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