@article{4b57d25dfaa848e8aa2e326394127aa9,
title = "Soliton refraction by an optical soliton gas",
abstract = "We report an optical fiber experiment in which we investigate the interaction between an individual soliton and a dense soliton gas. We evidence a refraction phenomenon where the tracer soliton experiences an effective velocity change due to its interaction with the optical soliton gas. This interaction results in a significant spatial shift that is measured and compared with theoretical predictions obtained via the inverse scattering transform theory. The effective velocity change associated with the refraction phenomenon is found to be in good quantitative agreement with the results of the spectral kinetic theory of soliton gas. Our results validate the collision rate ansatz that plays a fundamental role in the kinetic theory of soliton gas and also is at the heart of generalized hydrodynamics of many-body integrable systems.",
author = "Pierre Suret and Martin Dufour and Giacomo Roberti and Gennady El and Fran{\c c}ois Copie and Stephane Randoux",
note = "Funding information: This work has been partially supported by the Agence Nationale de la Recherche through the StormWave (Grant No. ANR-21-CE30-0009) and SOGOOD (Grant No. ANR21-CE30-0061) projects, the LABEX CEMPI project (Grant No. ANR-11-LABX-0007), the Ministry of Higher Education and Research, the Hauts de France Council, and the European Regional Development Fund (ERDF) through the Nord-Pas de Calais Regional Research Council and the European Regional Development Fund (ERDF) through the Contrat de Projets Etat-R{\'e}gion (CPER Photonics for Society P4S). The authors thank the Isaac Newton Institute for Mathematical Sciences for support and hospitality during the programme “Dispersive Hydrodynamics: Mathematics, Simulation and Experiments, with Applications in Nonlinear Waves” when part of the work on this paper was undertaken. G.E.{\textquoteright}s and G.R.{\textquoteright}s work was also supported by EPSRC Grant No. EP/W032759/1. G.R. thanks the Simons Foundation for partial support.",
year = "2023",
month = oct,
day = "2",
doi = "10.1103/PhysRevResearch.5.L042002",
language = "English",
volume = "5",
pages = "1--6",
journal = "Physical Review Research",
issn = "2643-1564",
publisher = "American Physical Society",
number = "4",
}