Generation of discrete breathers from linear to nonlinear Anderson disorder in electrical lattices
Abstract
We investigate linear and nonlinear localization in a disordered electrical lattice composed of coupled LC resonators. In the linear regime, the normal-mode spectrum and spatial voltage profiles are characterized theoretically and experimentally, revealing strongly localized Anderson modes induced by capacitive disorder. Good agreement is found between numerical predictions and experimental measurements of resonance frequencies, spatial profiles, inverse participation ratios, and localization lengths. Nonlinearity is introduced through varactor diodes, allowing the numerical continuation of a selected Anderson-localized mode into a family of discrete breathers. Floquet analysis indicates that these nonlinear localized solutions remain spectrally stable over the investigated frequency range, while their spatial localization evolves with increasing amplitude. Experimental measurements reveal nonlinear resonance bending, frequency shifts, and hysteresis, in qualitative agreement with the predicted nonlinear behavior. These results provide numerical evidence for the emergence of stable, disorder-pinned discrete breathers from Anderson-localized modes, supported by experimental observations of the associated nonlinear resonant response, and highlight the interplay between disorder and nonlinearity in electrical lattices.
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BibTeX
@misc{chen2026generation,
title = {{Generation of discrete breathers from linear to nonlinear Anderson disorder in electrical lattices}},
author = {Xuan-Lin Chen and F. Palmero},
howpublished = {arXiv},
year = {2026},
month = oct,
doi = {10.48550/arxiv.2610.38116},
eprint = {2610.38116},
archivePrefix = {arXiv},
url = {https://arxiv.org/abs/2610.38116},
}
RIS
TY - UNPB
TI - Generation of discrete breathers from linear to nonlinear Anderson disorder in electrical lattices
AU - Xuan-Lin Chen
AU - F. Palmero
PY - 2026
DA - 2026/10/28
PB - arXiv
DO - 10.48550/arxiv.2610.38116
UR - https://arxiv.org/abs/2610.38116
AB - We investigate linear and nonlinear localization in a disordered electrical lattice composed of coupled LC resonators. In the linear regime, the normal-mode spectrum and spatial voltage profiles are characterized theoretically and experimentally, revealing strongly localized Anderson modes induced by capacitive disorder. Good agreement is found between numerical predictions and experimental measurements of resonance frequencies, spatial profiles, inverse participation ratios, and localization lengths. Nonlinearity is introduced through varactor diodes, allowing the numerical continuation of a selected Anderson-localized mode into a family of discrete breathers. Floquet analysis indicates that these nonlinear localized solutions remain spectrally stable over the investigated frequency range, while their spatial localization evolves with increasing amplitude. Experimental measurements reveal nonlinear resonance bending, frequency shifts, and hysteresis, in qualitative agreement with the predicted nonlinear behavior. These results provide numerical evidence for the emergence of stable, disorder-pinned discrete breathers from Anderson-localized modes, supported by experimental observations of the associated nonlinear resonant response, and highlight the interplay between disorder and nonlinearity in electrical lattices.
ER -