30 citations · 94 across the 15 of their papers we have counts for
7 papers · 1 filter
Decoherence of spin superposition state caused by a quantum electromagnetic field
Kensuke Gallock-Yoshimura, Yuuki Sugiyama, Akira Matsumura +1
In this study, we investigate the decoherence of a spatially superposed electrically neutral spin- particle in the presence of a relativistic quantum electromagnetic field…
Quantumness of gravitational field: A perspective on monogamy relation
Yuuki Sugiyama, Akira Matsumura, Kazuhiro Yamamoto
Understanding the phenomenon of quantum superposition of gravitational fields induced by massive quantum particles is an important starting point for quantum gravity. The purpose o…
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…
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-…
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…
Consistency between causality and complementarity guaranteed by the Robertson inequality in quantum field theory
Yuuki Sugiyama, Akira Matsumura, Kazuhiro Yamamoto
It has long been debated whether gravity should be quantized or not. Recently, the authors in [Sci. Rep. 6, 22777 (2016); Proc. Natl. Acad. Sci. U.S.A. 106, 3035 (2009)] discussed…
Effects of photon field on entanglement generation in charged particles
Yuuki Sugiyama, Akira Matsumura, Kazuhiro Yamamoto
The Bose-Marletto-Vedral (BMV) experiment [3, 4] is a proposal for testing the quantum nature of gravity with entanglement due to Newtonian gravity. This proposal has stimulated co…