Universal 1/f Noise in the Power Spectra of Energy Time-series in Solvated DNA Dynamics
Abstract
We investigate energy fluctuations of solvated DNA in three conformations: G-quadruplex, Hairpin, and Duplex. Our comprehensive molecular dynamics (MD) simulations demonstrate that the time-series of interaction energies for DNA self, DNA-water and DNA-ion show 1/f noise with a universal decay exponent β≃ 0.90. We show that DNA topology and structural rigidity modulate its dynamic coupling with the surrounding hydration shell and mobile counter-ions. This coupling critically shapes the 1/f noise profile: DNA self energies in flexible structures (G-quadruplex, Hairpin) display pronounced low-frequency modes absent in the rigid Duplex. These findings reveal how the interplay between DNA topology and environmental coupling governs different stochastic behavior in biologically relevant forms of DNA.
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BibTeX
@misc{sahu2026universal,
title = {{Universal 1/f Noise in the Power Spectra of Energy Time-series in Solvated DNA Dynamics}},
author = {Harsh Sahu and Deepika Sardana and Pramod Kumar and Ajay Kumar Chand and Sobhan Sen and Sanjay Puri},
howpublished = {arXiv},
year = {2026},
month = sep,
doi = {10.48550/arxiv.2609.20391},
eprint = {2609.20391},
archivePrefix = {arXiv},
url = {https://arxiv.org/abs/2609.20391},
}
RIS
TY - UNPB
TI - Universal 1/f Noise in the Power Spectra of Energy Time-series in Solvated DNA Dynamics
AU - Harsh Sahu
AU - Deepika Sardana
AU - Pramod Kumar
AU - Ajay Kumar Chand
AU - Sobhan Sen
AU - Sanjay Puri
PY - 2026
DA - 2026/09/17
PB - arXiv
DO - 10.48550/arxiv.2609.20391
UR - https://arxiv.org/abs/2609.20391
AB - We investigate energy fluctuations of solvated DNA in three conformations: G-quadruplex, Hairpin, and Duplex. Our comprehensive molecular dynamics (MD) simulations demonstrate that the time-series of interaction energies for DNA self, DNA-water and DNA-ion show 1/f noise with a universal decay exponent β≃ 0.90. We show that DNA topology and structural rigidity modulate its dynamic coupling with the surrounding hydration shell and mobile counter-ions. This coupling critically shapes the 1/f noise profile: DNA self energies in flexible structures (G-quadruplex, Hairpin) display pronounced low-frequency modes absent in the rigid Duplex. These findings reveal how the interplay between DNA topology and environmental coupling governs different stochastic behavior in biologically relevant forms of DNA.
ER -