Work

Propagation properties and stability of dark solitons in weakly interacting Bose–Bose droplets

Year: 2024

Type: article

Abstract: We investigate dark solitons in two-component Bose systems with competing interactions in one dimension. Such a system hosts a liquid phase stabilized by the beyond-mean field corrections. Using the generalized Gross–Pitaevskii equation, we reveal the presence of two families of solitonic solutions. The solitons in both of them can be engineered to be arbitrarily wide. One family of solutions, however, has an anomalous dispersion relation, and our analyses show one of its branches is unstable. We find a critical velocity that demarcates the stable from unstable solutions. Nonetheless, gray anomalous solitons can exist inside quantum droplets and can be treated as solitonic excitations thereof.

Source: Journal of Physics B Atomic Molecular and Optical Physics

DOI: 10.1088/1361-6455/ad2546

Authors: Jakub Kopyciński, Buğra Tüzemen, Wojciech Górecki, Krzysztof Pawłowski, Maciej Łebek

Institutions: Center for Theoretical Physics, Polish Academy of Sciences, University of Warsaw

Language: English

Topic: Cold Atom Physics and Bose-Einstein Condensates

Subfield: Atomic and Molecular Physics, and Optics

Field: Physics and Astronomy

Domain: Physical Sciences

Open Access status: hybrid

Estimated APC paid: $3,165

Funder: Narodowe Centrum Nauki