Signatures of rigidity and second sound in dipolar supersolids
Abstract
We propose a dynamical protocol to probe the rigidity and phase coherence of dipolar supersolids by merging initially separated fragments in quasi-one-dimensional (1D) double-well potentials. Simulations based on the extended Gross-Pitaevskii equation reveal distinct dynamical signatures across phases. Supersolids exhibit damped crystal oscillations following barrier removal, with the damping rate reflecting superfluid connectivity. A phase-imprinted jump additionally triggers metastable dark solitons, which excites second sound, as revealed by an out-of-phase drift between the droplet lattice and the superfluid background. Our results show a realizable path to dynamically detect the second sound and rigidity of supersolids, as well as to realize and probe soliton formation.
Cite
@article{arxiv.2506.22290,
title = {Signatures of rigidity and second sound in dipolar supersolids},
author = {G. A. Bougas and T. Bland and H. R. Sadeghpour and S. I. Mistakidis},
journal= {arXiv preprint arXiv:2506.22290},
year = {2026}
}
Comments
6 pages, 6 figures, 6 pages of Supplemental Material