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Analogues of Josephson junctions and black hole event horizons in atomic Bose–Einstein condensates

Analogues of Josephson junctions and black hole event horizons in atomic Bose–Einstein condensates

We study dynamical processes in coherently coupled atomic Bose–Einstein condensates. Josephson effects in ring-shaped and dumbbell geometries are theoretically investigated. Conditions for observation of the Josephson effect are revealed. We found that multicharged persistent current in toroidal c...

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Bibliographic Details
Main Authors: Yakimenko, A.I., Matsyshyn, O.I., Oliinyk, A.O., Biloshytskyi, V.M., Chelpanova, O.G., Vilchynskii, S.I.
Format: Article
Language:English
Published: Фізико-технічний інститут низьких температур ім. Б.І. Вєркіна НАН України 2018
Series:Физика низких температур
Subjects:
Актуальні проблеми квантових рідин та кристалів
Online Access:http://dspace.nbuv.gov.ua/handle/123456789/176265
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Summary:We study dynamical processes in coherently coupled atomic Bose–Einstein condensates. Josephson effects in ring-shaped and dumbbell geometries are theoretically investigated. Conditions for observation of the Josephson effect are revealed. We found that multicharged persistent current in toroidal condensate can be robust even for supersonic atomic flow. In numerical simulations the acoustic analogues of event horizon in quantized superflow were observed. These theoretical finding open perspectives for investigation of Bose Josephson junctions and quantum aspects of acoustic analogue of Hawking radiation in existing experimental setups.

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