2 citations · 2 across the 4 of their papers we have counts for
5 papers
Theoretical Aspects of Direct Waves in Kerr Black Holes: Pole-Splitting Method for Ringdown Analysis
Nao Nakamoto, Naritaka Oshita, Hiroki Takeda
We formulate the theoretical aspects of direct waves (DWs) in the case of extreme-mass merger. A DW is a source-driven waveform characterized by a complex frequency , wh…
Detectability of avoided crossings in black hole ringdowns
Hayato Imafuku, Naritaka Oshita, Hiroki Takeda
Quasinormal modes (QNMs) of black holes can exhibit avoided crossings (ACs), in which specific QNM frequencies approach each other while their amplitudes are enhanced and acquire n…
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…
Gravitational-wave constraints on scalar-tensor gravity from a neutron star and black-hole binary GW200115
Hiroki Takeda, Shinji Tsujikawa, Atsushi Nishizawa
In nonminimally coupled theories where a scalar field is coupled to the Ricci scalar, neutron stars (NSs) can have scalar charges through an interaction with matter mediated by gra…
Exploring spin of ultralight dark matter with gravitational wave detectors
Yusuke Manita, Hiroki Takeda, Katsuki Aoki +2
We propose a novel method for distinguishing the spin of ultralight dark matter (ULDM) using interferometric gravitational wave detectors. ULDM can be a bosonic field of spin-0, 1,…