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Noise-induced temporal regularity and signal amplification in an optomechanical system with parametric instability
- Source :
- Opt. Express 26(25), 32433-32441 (2018)
- Publication Year :
- 2018
-
Abstract
- Noise usually has an unwelcome influence on system performance. For instance, noise inevitably affects the low-frequency mechanical freedom in optomechanical experiments. However, we investigate here the beneficial effects of thermal noise on a basic optomechanical system with parametric instability. In a regime near parametric instability, it is found that thermal noise in the mechanical freedom can sustain long-term quasi-coherent oscillations when the system would otherwise remain in the equilibrium state. In an overlapping regime of parametric instability and bistability, intermittent switching between a self-sustained oscillating state and an equilibrium can be induced by adding a certain amount of noise. When a subthreshold periodic signal is applied to the mechanics, the switching between the self-sustained oscillations and the equilibrium exhibits good periodicity at a rate that is synchronized to the signal frequency, resulting in a significant amplification of the signal. Our results deepen the understanding of the interplay between optomechanical nonlinearity and noise and provide theoretical guidance for experimental observation of noise-induced beneficial phenomena in optomechanics.<br />Comment: 9 pages, 4 figures
- Subjects :
- Quantum Physics
Subjects
Details
- Database :
- arXiv
- Journal :
- Opt. Express 26(25), 32433-32441 (2018)
- Publication Type :
- Report
- Accession number :
- edsarx.1811.11887
- Document Type :
- Working Paper
- Full Text :
- https://doi.org/10.1364/OE.26.032433