Talk on "Prospect for the ground state cooling of mg-scale mechanical oscillators"

28.09.2018 10:30 - 12:00

by Nobuyuki Matsumoto; Frontier Research Institute for Interdisciplinary Sciences, Tohoku University

We are trying to realize the ground state cooling of a center of mass motion of a mg-scale suspended mirror by optical trapping and feedback cooling. Currently, measured noise power spectral density is almost dominated by Brownian motions of the optically trapped pendulum’s center of mass mode, whose noise level is determined by the resonant frequency of 280 Hz and the effective quality factor of over 10^8. In this talk, I will introduce you to methods of reducing the noise level in our displacement sensing system and future plans to realize the ground state. 


Host: M. Aspelmeyer

Ernst Mach Lecture Hall, 2nd Floor, Boltzmanngasse 5, 1090 Vienna