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arXiv · 2608.28731

Statistical Properties of a Fluctuation-Driven Nanomechanical Duffing Resonator

Monan Ma·Nathan Welles·Johnathon Barbish·Ismet I. Kaya·M. Selim Hanay·Oleksiy Svitelskiy·Mark R. Paul·Kamil L. Ekinci
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Abstract

We investigate the fluctuating nonlinear dynamics of multiple modes of a nanomechanical doubly clamped beam resonator. Each mode is driven by Gaussian force noise centered around the resonance; the mode response is monitored while the force magnitude is increased, inducing a transition from harmonic to the nonlinear Duffing regime. To characterize the dynamics, we introduce an effective temperature based on the mode fluctuation amplitude. As the nonlinearity becomes prominent at large amplitudes, we observe a reduction in the effective thermal energy and a crossover in response statistics from Gaussian to platykurtic, consistent with the dynamics expected in a Duffing potential.

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Monan Ma, Nathan Welles, Johnathon Barbish, Ismet I. Kaya, M. Selim Hanay, Oleksiy Svitelskiy, Mark R. Paul, Kamil L. Ekinci. 2026-08-28. Statistical Properties of a Fluctuation-Driven Nanomechanical Duffing Resonator. https://arxiv.org/abs/2608.28731

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