Oscillating Solitons and ac Josephson Effect in Ferromagnetic Bose-Bose Mixtures

Year: 2023

Authors: Bresolin S., Roy A., Ferrari G., Recati A., Pavloff N.

Autors Affiliation: Univ Trento, Pitaevskii BEC Ctr, CNR INO, Via Sommar 14, I-38123 Trento, Italy; Univ Trento, Dipartimento Fis, Via Sommar 14, I-38123 Trento, Italy; Indian Inst Technol Mandi, Sch Phys Sci, Mandi 175075, Himachal Prades, India; Univ Paris Saclay, CNRS, LPTMS, F-91405 Orsay, France; Inst Univ France IUF, Paris, France.

Abstract: Close to the demixing transition, the degree of freedom associated with relative density fluctuations of a two-component Bose-Einstein condensate is described by a nondissipative Landau-Lifshitz equation. In the quasi-one-dimensional weakly immiscible case, this mapping surprisingly predicts that a dark-bright soliton should oscillate when subject to a constant force favoring separation of the two components. We propose a realistic experimental implementation of this phenomenon which we interpret as a spin -Josephson effect in the presence of a movable barrier.

Journal/Review: PHYSICAL REVIEW LETTERS

Volume: 130 (22)      Pages from: 220403-1  to: 220403-6

More Information: We thank A. Kamchatnov and G. Lamporesi for fruitful discussions. This work has been funded from Provincia Autonoma di Trento, from the Italian MIUR under the PRIN 2017 project CEnTraL (Protocol No. 20172H2SC4) . A. Roy acknowledges the support of the Science and Engineering Research Board (SERB), Department of Science and Technology, Government of India under the project SRG/2022/000057 and IIT Mandi seed-grant funds under the project IITM/SG/AR/87. This work has benefited from Q@TN, the joint lab between University of Trento, FBK-Fondazione Bruno Kessler, INFN-National Institute for Nuclear Physics and CNR-National Research Council.
KeyWords: Bloch Oscillations; Dynamics
DOI: 10.1103/PhysRevLett.130.220403

ImpactFactor: 8.100
Citations: 3
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