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Testing the quantum nature of gravity through interferometry
Yubao Liu, Yanbei Chen, Kentaro Somiya +1
We propose a Michelson-type interferometric protocol for testing the quantum nature of gravity through testing the phenomenology of semi-classical gravity theory, which predicts a…
Quantum Back Action Evasion with Reservoir Engineering
Yohei Nishino, James W. Gardner, Yanbei Chen +1
We propose a back-action evading scheme for a free mass that combines reservoir engineering with velocity measurement. The underlying principle follows the double-pass-type speed m…
Teleportation-based Speed Meter for Precision Measurement
Yohei Nishino, James W. Gardner, Yanbei Chen +1
We propose a quantum teleportation-based speed meter for interferometric displacement sensing. Two equivalent implementations are presented: an online approach that uses real-time…
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…
Quantum noise of a Michelson-Sagnac interferometer with translucent mechanical oscillator
Kazuhiro Yamamoto, Daniel Friedrich, Tobias Westphal +5
Quantum fluctuations in the radiation pressure of light can excite stochastic motions of mechanical oscillators thereby realizing a linear quantum opto-mechanical coupling. When pe…
Probing macroscopic quantum states with a sub-Heisenberg accuracy
Haixing Miao, Stefan Danilishin, Helge Muller-Ebhardt +3
Significant achievements in the reduction of classical-noise floor will allow macroscopic systems to prepare nearly Heisenberg-Limited quantum states through a continuous measureme…
Quantum state preparation and macroscopic entanglement in gravitational-wave detectors
Helge Mueller-Ebhardt, Henning Rehbein, Chao Li +5
Long-baseline laser-interferometer gravitational-wave detectors are operating at a factor of 10 (in amplitude) above the standard quantum limit (SQL) within a broad frequency band.…
Reduction and possible elimination of coating thermal noise using a rigidly controlled cavity with a QND technique
Kentaro Somiya
Thermal noise of a mirror is one of the most important issues in high precision measurements such as gravitational-wave detection or cold damping experiments. It has been pointed o…
Creation of a quantum oscillator by classical control
Stefan Danilishin, Helge Müller-Ebhardt, Henning Rehbein +7
As a pure quantum state is being approached via linear feedback, and the occupation number approaches and eventually goes below unity, optimal control becomes crucial. We obtain th…