30 citations · 67 across the 11 of their papers we have counts for
5 papers · 1 filter
Time-of-flight force sensing below the quantum zero-point fluctuation
Sotatsu Otabe, Mitsuyoshi Kamba, Yuto Kojima +1
Sensing weak forces through observing a mechanical motion near or below its quantum zero-point fluctuation has been desired in diverse areas. While mechanical oscillators have play…
A levitated nano-accelerometer sensitized by quantum quench
M. Kamba, S. Otabe, K. Funo +2
We realize a nanoscale accelerometer exploiting the nonequilibrium dynamics of a nanoparticle near the quantum ground state. We explore the dynamics after quenching the trapping po…
Kerr-Enhanced Optical Spring
Sotatsu Otabe, Wataru Usukura, Kaido Suzuki +4
We propose and experimentally demonstrate the generation of enhanced optical springs using the optical Kerr effect. A nonlinear optical crystal is inserted into a Fabry-Perot cavit…
Photothermal effect in macroscopic optomechanical systems with an intracavity nonlinear optical crystal
Sotatsu Otabe, Kentaro Komori, Ken-ichi Harada +3
Intracavity squeezing is a promising technique that may improve the sensitivity of gravitational wave detectors and cool optomechanical oscillators to the ground state. However, th…
Improving force sensitivity by amplitude measurement of light reflected from a detuned optomechanical cavity
Kentaro Komori, Takuya Kawasaki, Sotatsu Otabe +3
The measurement of weak continuous forces exerted on a mechanical oscillator is a fundamental problem in various physical experiments. It is fundamentally impeded by quantum back-a…