3 papers
gr-qc2026
Gravitationally Induced Quantum Decoherence of Macroscopic Objects
Hiroki Takeda, Shogo Tomizuka, Takahiro Tanaka
We formulate the gravitationally induced quantum decoherence of a massive object prepared in a spatial superposition. Starting from linearized gravity coupled to a massive system p…
quant-ph2026
Emergence of Non-Markovian Classical-Quantum Dynamics from Decoherence
Shogo Tomizuka, Hiroki Takeda
The quantum nature of gravity remains experimentally unverified, despite recent proposals to probe it using tabletop experiments such as gravity-mediated entanglement schemes. In p…
gr-qc2025
Quasinormal Modes from EFT of Black Hole Perturbations in Vector-Tensor Gravity
Shogo Tomizuka, Hajime Kobayashi, Naritaka Oshita +2
We study the dynamics of odd-parity perturbations on a static and spherically symmetric black hole background with a timelike vector field based on the effective field theory (EFT)…