6 papers
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…
Observation of an Optical Spring in a Robustly Controlled Signal-Recycled Michelson Interferometer
Kaido Suzuki, Ken-ichi Harada, Ryo Iden +4
We present, to the best of our knowledge, the first demonstration of an optical spring in a signal-recycled Michelson interferometer without arm cavities. The setup utilizes multip…
Sensitivity Enhancement in Atom-Interferometer Gyroscopes via Phase-Modulation Signal Readout Scheme
Sotatsu Otabe, Naoki Kaku, Tomoya Sato +3
Quantum sensors based on atom interferometers are advancing both fundamental physics and practical applications, with higher sensitivity being a key requirement for these investiga…
Closed-loop measurements in an atom interferometer gyroscope with velocity-dependent phase-dispersion compensation
Tomoya Sato, Naoki Nishimura, Naoki Kaku +4
Atom interferometer-based gyroscopes are expected to have a wide range of applications due to their high sensitivity. However, their dynamic range is limited by dephasing caused by…
Analyzing the sensitivity of an atom interferometer with a phase-modulation readout scheme
Takuya Kawasaki, Sotatsu Otabe, Tomoya Sato +3
The sensitivity of an interferometer depends on its readout scheme. However, little attention has been paid to the readout schemes of atom interferometers from the viewpoint of the…