Vortex to Rotons Transition in Dipolar Bose-Einstein Condensates
Abstract
Recent experimental advancements enabled the creation of various systems exhibiting superfluid behavior, with one notable achievement being the development of dipolar Bose-Einstein condensates (dBECs). When confined along one or more spatial dimensions, these condensates exhibit a dispersion relation reminiscent of superfluid liquid helium, featuring a roton-like minimum. This study investigates the existence of two-dimensional solitary waves in dBECs characterised by topological defects (quantised vortices) and their transition to vortex-free Jones-Roberts solitons. The explicit connection between solitary waves and roton excitation is demonstrated, supporting Feynman's hypothesis regarding the nature of rotons as fading vortex excitations.
Keywords
Cite
@article{arxiv.2407.18412,
title = {Vortex to Rotons Transition in Dipolar Bose-Einstein Condensates},
author = {Alberto Villois and Miguel Onorato and Davide Proment},
journal= {arXiv preprint arXiv:2407.18412},
year = {2025}
}