67 citations · 165 across the 12 of their papers we have counts for
21 papers
Quantum uncertainty of gravitational field and entanglement in superposed massive particles
Yuuki Sugiyama, Akira Matsumura, Kazuhiro Yamamoto
Investigating the quantum nature of gravity is an important issue in modern physics. Recently, studies pertaining to the quantum superposition of gravitational potential have garne…
Enhancement of quantum gravity signal in an optomechanical experiment
Youka Kaku, Tomohiro Fujita, Akira Matsumura
No experimental evidence of the quantum nature of gravity has been observed yet and a realistic setup with improved sensitivity is eagerly awaited. We find two effects, which can s…
Quantum state of a suspended mirror coupled to cavity light -- Wiener filter analysis of the pendulum and rotational modes
Tomoya Shichijo, Nobuyuki Matsumoto, Akira Matsumura +3
We investigated the quantum state of an optomechanical suspended mirror under continuous measurement and feedback control using Wiener filtering. We focus on the impact of the two-…
Reduced dynamics with Poincaré symmetry in an open quantum system
Akira Matsumura
We consider how the reduced dynamics of an open quantum system coupled to an environment admits the Poincaré symmetry. The reduced dynamics is described by a dynamical map, which i…
Effective description of a suspended mirror coupled to cavity light -Limitations of Q-enhancement due to normal mode splitting by an optical spring-
Yuuki Sugiyama, Tomoya Shichijo, Nobuyuki Matsumoto +3
Pendulums have long been used as force sensors due to their ultimately low dissipation (high-quality factor) characteristic. They are widely used in the measurement of the gravitat…
Generating quantum entanglement between macroscopic objects with continuous measurement and feedback control
Daisuke Miki, Nobuyuki Matsumoto, Akira Matsumura +4
This study is aimed at investigating the feasibility of generating quantum entanglement between macroscopic mechanical mirrors in optomechanical systems while under continuous meas…