Explaining Optomechanical Libration Spectra: A Stochastic Simulation Approach
Computational Physics
2025-09-03 v1
Abstract
We present a practical and computationally effective Ito-Taylor expansion based stochastic simulation framework for modeling rotational optomechanics experiments. By developing a model using this framework, we could capture the nonlinear orientation dynamics of an optically levitated, nearly cylindrically symmetric nanodumbbell. It successfully reproduces and explains shoulder-like features observed in the power spectral density of libration, which we show arising from the interplay between confined libration and thermally driven rotation around the particle symmetry axis.
Cite
@article{arxiv.2509.01636,
title = {Explaining Optomechanical Libration Spectra: A Stochastic Simulation Approach},
author = {Ankush Gogoi and Vikram Pakrashi and Joanna A. Zielinska},
journal= {arXiv preprint arXiv:2509.01636},
year = {2025}
}