PreprintCC BY 4.0arXiv
Quasi-solitons of the 1D Bose gas at arbitrary-strength contact repulsion
Abstract
Harnessing integrability at arbitrary interaction strength, we build long-lived and spatially localized soliton-like excitations in the 1D Bose gas with contact repulsion (Lieb-Liniger model). We show how these density profiles, built from selective superpositions of multi-hole eigenstates, display long lifetimes tunable through parameters like dispersion width and number of holes. We further illustrate a scaling protocol that in principle enables unbounded increase in lifetimes in the thermodynamic limit. Our results showcase classical-like excitations originating from unitary quantum dynamics, away from the semi-classical regime, and in regions where interactions cannot be treated perturbatively.
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BibTeX
@misc{sarvi2026quasisolitons,
title = {{Quasi-solitons of the 1D Bose gas at arbitrary-strength contact repulsion}},
author = {Anahita Sarvi and Cesare Vianello and Jean-Sébastien Caux},
howpublished = {arXiv},
year = {2026},
month = oct,
doi = {10.48550/arxiv.2610.04492},
eprint = {2610.04492},
archivePrefix = {arXiv},
url = {https://arxiv.org/abs/2610.04492},
note = {CC BY 4.0},
}
RIS
TY - UNPB
TI - Quasi-solitons of the 1D Bose gas at arbitrary-strength contact repulsion
AU - Anahita Sarvi
AU - Cesare Vianello
AU - Jean-Sébastien Caux
PY - 2026
DA - 2026/10/03
PB - arXiv
DO - 10.48550/arxiv.2610.04492
UR - https://arxiv.org/abs/2610.04492
AB - Harnessing integrability at arbitrary interaction strength, we build long-lived and spatially localized soliton-like excitations in the 1D Bose gas with contact repulsion (Lieb-Liniger model). We show how these density profiles, built from selective superpositions of multi-hole eigenstates, display long lifetimes tunable through parameters like dispersion width and number of holes. We further illustrate a scaling protocol that in principle enables unbounded increase in lifetimes in the thermodynamic limit. Our results showcase classical-like excitations originating from unitary quantum dynamics, away from the semi-classical regime, and in regions where interactions cannot be treated perturbatively.
ER -