Estimation of thermal noise by a direct measurement of the mechanical conductance

Autor:	Shigemi Otsuka, N. Ohishi, Kimio Tsubono, Keita Kawabe
Rok vydání:	2000
Předmět:	Mechanical system Physics Fluctuation-dissipation theorem Quantum mechanics General Physics and Astronomy Conductance Computational physics
Zdroj:	Physics Letters A. 266:228-233
ISSN:	0375-9601
Popis:	We present a new method for estimating the thermal noise at off-resonant frequencies in a mechanical system. In this method, the mechanical conductance is directly measured at anti-resonant frequencies, and then the fluctuation-dissipation theorem is applied to the measured conductance in order to evaluate the thermal noise. To confirm the validity of this method, we demonstrated a direct measurement of the mechanical conductance of a 2-mode oscillator at an anti-resonant frequency. The measured conductance was in good agreement with the value calculated by the normal-mode expansion.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::d24b93d675fb26a99a1dd7da400abae1 https://doi.org/10.1016/s0375-9601(99)00867-1 Zobrazit plný text záznamu Full Text from ScienceDirect