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論文

2024

Tomoya HirotaniAkira Matsumura, Yasusada Nambu, Kazuhiro Yamamoto,

“Large violation of Leggett-Garg inequalities with coherent-state projectors for a harmonic oscillator and chiral scalar field”

arXiv:2401.10692 [quant-ph]

Yuuki Sugiyama, Akira Matsumura, Kazuhiro Yamamoto

“Quantumness of gravitational field: A perspective on monogamy relation”

arXiv:2401.03867 [quant-ph]

2023

Daisuke Miki, Akira Matsumura, Kazuhiro Yamamoto, 

“Negativity volume of the generalized Wigner function in gravitating hybrid system”

arXiv:2311.10980 [quant-qc]

Sugumi Kanno, Jiro Soda, Akira Taniguchi, 

“Search for high-frequency gravitational waves with Rydberg atoms”

arXiv:2311.03890 [gr-qc]

Masaki TaniKosei HatakeyamaDaisuke MikiYuuki YamasakiKazuhiro Yamamoto

“Violation of the two-time Leggett-Garg inequalities for a coarse-grained quantum field”

arXiv:2311.02867 [quant-ph]

Daisuke Miki, Akira Matsumura, Kazuhiro Yamamoto,

“Quantum signature of gravity in optomechanical systems with conditional measurement”

arXiv:2311.00563 [gr-qc]

Kosei HatakeyamaDaisuke MikiMasaki TaniYuuki YamasakiSatoshi IsoApriadi Salim AdamAr RohimKazuhiro Yamamoto

“Violation of the two-time Leggett-Garg inequalities for a harmonic oscillator”

arXiv:2310.16471 [quant-ph]

​Tomohiro FujitaYouka KakuAkira MatumuraYuta Michimura

“Inverted Oscillators for Testing Gravity-induced Quantum Entanglement”

arXiv:2308.14552 [quant-ph]

Fumiya Nishimura, Yui Kuramochi, Kazuhiro Yamamoto

“Standard quantum limit of finite-size optical lattice clock in estimating gravitational potential”

arXiv:2308.03335 [quant-ph]

Yuuki Sugiyama, Akira Matsumura, Kazuhiro Yamamoto

“Quantum uncertainty of gravitational field and entanglement in superposed massive particles”

arXiv:2308.03093 [quant-ph]

Youka Kaku, Tomohiro Fujita, Akira Matsumura,

"Enhancement of quantum gravity signal in an optomechanical experiment"

arXiv:2306.02974 [gr-qc]

Shinichiro Yamano, Takaya Matsuura, Yui Kuramochi, Toshihiko Sasaki, Masato Koashi

"General treatment of Gaussian trusted noise in continuous variable quantum key distribution"

arXiv:2305.17684 [quant-ph]

Sugumi Kanno, Jiro Soda, Akira Taniguchi,

"Circularly polarized gravitational waves in Chern-Simons gravity originated from an axion domain wall"

arXiv:2304..03944 [hep-th]

Tomoya Shichijo, Nobuyuki Matsumoto, Akira Matsumura, Daisuke Miki, Yuuki Sugiyama, Kazuhiro Yamamoto,

"Quantum state of a suspended mirror coupled to cavity light - Wiener filter analysis of the pendulum and rotational modes-"

arXiv:2303.04511 [quant-ph]

Sugumi Kanno, Ann Nakato, Jiro Soda, Kazushige Ueda,

"A peak in the power spectrum of primordial gravitational waves induced by primordial magnetic fields"

arXiv:2301.13540 [hep-th]

 

Takaya Matsuura, Shinichiro Yamano, Yui Kuramochi, Toshihiko Sasaki, Masato Koashi,

"Refined finite-size analysis of binary-modulation continuous-variable quantum key distribution"

arXiv:2301.03171 [quant-ph]

Akira Matsumura

"Reduced dynamics with Poincaré symmetry in open quantum system"

arXiv:2301.01451 [quant-ph]

2022

Sugumi Kanno, Jiro Soda, Kazushige Ueda

"Impact of quantum entanglement induced by magnetic fields on primordial gravitational waves"

arXiv:2211.05576 [hep-th]

Yuuki Sugiyama, Tomoya Shichijo,  Nobuyuki MatsumotoAkira Matsumura, Daisuke Miki, Kazuhiro YamamotoNaoki Yamamoto

"Effective description of a suspended mirror coupled to cavity light - Limitations of Q-enhancement due to normal mode splitting by an optical spring -"

arXiv:2212.11056 [Optics]

Daisuke MikiNobuyuki MatsumotoAkira MatsumuraTomoya ShichijoYuuki SugiyamaKazuhiro YamamotoNaoki Yamamoto

"Generating quantum entanglement between macroscopic objects with continuous measurement and feedback control"

arXiv:2210.13169 [quant-th]

Sugumi Kanno, Ann Nakato, Jiro Soda, Kazushige Ueda

"Anisotropic warm inflation"

arXiv:2209.05776 [hep-th]

Issei Koga, Naritaka Oshita, Kazushige Ueda

"dS4 universe emergent from Kerr-AdS5 spacetime: bubble nucleation catalyzed by a black hole"

arXiv:2209.05625 [hep-th]

Yui Kuramochi, Hiroyasu Tajima

"Wigner-Araki-Yanase theorem for continuous and unbounded conserved observables"

arXiv:2208.13494 [quant-ph]

Shinichiro Yamano,  Takaya Matsuura, Yui Kuramochi, Toshihiko Sasaki, Masato Koashi

"Finite-size security proof of binary-modulation continuous-variable quantum key distribution using only heterodyne measurement"

arXiv:2208.11983 [quant-ph]

Ar Rohim,  Apriadi Salim Adam, Kazuhiro Yamamoto

"Massive fermion between two parallel chiral plates"

arXiv:2208.05150 [hep-ph]

Sugumi Kanno, Jiro Soda, Kazushige Ueda

"Conversion of squeezed gravitons into photons during inflation"

arXiv:2207.05734 [hep-th]

Hiroyasu Tajima, Ryuji Takagi, Yui Kuramochi,

"Universal trade-off structure between symmetry, irreversibility, and quantum coherence in quantum processes"

arXiv:2206.11086 [quant-ph]

Sugumi Kanno, Misao Sasaki

"Graviton non-gaussianity in α-vacuum"

arXiv:2206.03667 [hep-th]

Yuuki Sugiyama, Akira Matsumura, Kazuhiro Yamamoto

"Consistency between causality and complementarity guaranteed by Robertson inequality in quantum field theory"

arXiv:2206.02506 [quant-ph]

Akira Matsumura

"Role of coherence in entanglement due to gravity"

arXiv:2204.00324 [quant-ph]

Yuuki Sugiyama, Akira Matsumura, Kazuhiro Yamamoto

“Effects of photon field on entanglement generation in charged particles”

arXiv:2203.09011 [quant-ph]

Masahiro Hotta, Yasusada Nambu, Yuuki Sugiyama, Kazuhiro Yamamoto, Go Yusa

"Expanding Edges of Quantum Hall Systems in a Cosmology Language"

arXiv:2202.03731 [gr-qc]

Issei Koga, Naritaka Oshita, Kazushige Ueda

"Global study of the scalar quasi-normal modes of Kerr-AdS5 black holes: Stability, thermality, and horizon area quantization"

arXiv:2201.07267 [hep-th]

2021

Sugumi Kanno, Jiro Soda

"Squeezed quantum states of graviton and axion in the universe"

arXiv:2112.14496 [gr-qc]

Koki Yamashita, Yue Nan, Yuuki Sugiyama, Kazuhiro Yamamoto

"Large-scale structure with superhorizon isocurvature dark energy"

arXiv:2112.12552 [astro-ph.CO]

Akira Matsumura

"Path-entangling evolution and quantum gravitational interaction"

arXiv:2112.09369 [quant-ph]

Yue Nan, Kazuhiro Yamamoto

"Dark energy model with very large-scale inhomogeneity"

arXiv:2111.14174 [astro-ph.CO]

Yui Kuramochi

"Infinite dimensionality of the post-processing order of measurements on a general state space"

arXiv:2111.14129 [quant-ph]

Akira Matsumura, Yasusada Nambu, Kazuhiro Yamamoto

"Leggett-Garg inequalities for testing quantumness of gravity"

arXiv:2111.14064 [quant-ph]

Daisuke Miki, Akira Matsumura, Kazuhiro Yamamoto

"Non-Gaussian entanglement in gravitating masses: the role of cumulants"

arXiv:2108.00662 [quant-ph]

Ar Rohim, Kazuhiro Yamamoto

"Effects of chiral MIT boundary conditions for Dirac particle in a box"

arXiv:2105.11351 [hep-ph]

Sugumi Kanno, Akira Matsumura, Jiro Soda

"Harvesting quantum coherence from axion dark matter"

arXiv:2105.12578 [quant-ph]

Kazushige Ueda, Atsushi Higuchi, Kazuhiro Yamamoto, Ar Rohim, Yue Nan

"Entanglement of the Vacuum between Left, Right, Future, and Past: Dirac spinor in Rindler spaces and Kasner spaces"

arXiv:2104.06625 [gr-qc]

Sugumi Kanno, Jiro Soda, Junsei Tokuda

"Indirect detection of gravitons through quantum entanglement"

arXiv:2103.17053 [gr-qc]

Haruka Sakemi, Rikuto Omae, Takumi Ohmura, Mami Machida

"Energy estimation of high energy particles associated with the SS433/W50 system through radio observation at 1.4 GHz"

arXiv:2103.05578 [astro-ph.HE]

Akira Matsumura

Field-induced entanglement in spatially superposed objects

arXiv:2102.10792 [quant-ph]

Hiroki Matsui

Lorentzian path integral for quantum tunneling and WKB approximation for wave-function

arXiv:2102.09767 [gr-qc]

Takumi OhmuraKojiro OnoHaruka SakemiYuta TashimaRikuto OmaeMami Machida

"Continuous Jets and Backflow Models for the Formation of W50/SS433 in Magnetohydrodynamics Simulations"

arXiv: 2102.06728 [astro-ph.HE]

2020

Yuuki SugiyamaKazuhiro YamamotoTsutomu Kobayashi

"Gravitational waves in Kasner spacetimes and Rindler wedges in Regge-Wheeler gauge: Unruh effect"

arXiv: 2012.15004 [gr-qc]

Akira MatsumuraKazuhiro Yamamoto

"Gravity-induced entanglement in optomechanical systems"

arXiv: 2010.05161 [gr-qc]

Daisuke MikiAkira MatsumuraKazuhiro Yamamoto

"Entanglement and decoherence of massive particles due to gravity"

arXiv: 2010.05159 [gr-qc]

Ar Rohim, Kazushige Ueda, Kazuhiro Yamamoto, Shih-Yuin Lin

"Relativistic quantum bouncing particles in a uniform gravitational field"

arXiv: 2005.13264 [gr-qc]

Akira Dohi, Ryotaro Kase, Rampei Kimura, Kazuhiro Yamamoto, Masa-aki Hashimoto

"Neutron star cooling in modified gravity theories"

arXiv: 2003.00795 [astro-ph.HE]

T. Ohmura, M. Machida, K. E. Nakamura, Y. Kudoh, R. Matsumoto

"Two-temperature Magnetohydrodynamic simulations for sub-relativistic AGN jets:

Dependence on the fraction of the electron heating"

arXiv: 2003.00795 [astro-ph.HE]

Shoji Kato, Mami Machida

"A Possible Origin of kHZ QPOs in Low-Mass X-ray Binaries"

arXiv: 2002.10630 [astro-ph.HE]

Akira Dohi, Masa-aki Hashimoto, Rio Yamada, Yasuhide Matsuo, Masayuki Fujimoto

"An approach to constrain models of accreting neutron stars with the use of an equation of state"

arXiv: 2002.08367 [astro-ph.SR]

2019
Marijke Haverkorn, Mami Machida, Takuya Akahori

"Workshop summary 'The Power of Faraday Tomography'"

arXiv: 1910.08120 [astro-ph.GA]

Akira Dohi, Ken'ichiro Nakazato, Masa-aki Hashimoto, Yasuhide Matsuo, Tsuneo Noda

"Possibility of rapid neutron star cooling with the realistic equation of state"

arXiv: 1910.01431 [astro-ph.HE]

Jen-Tsung Hsiang, B. L. Hu, Shih-Yuin Lin, Kazuhiro Yamamoto

"Fluctuation-Dissipation and Correlation-Propagation Relations in (1+3)D Moving Detector-Quantum Field Systems"

arXiv: 1906.00530 [hep-th]

Yue Nan, Kazuhiro Yamamoto, Hajime Aoki, Satoshi Iso, Daisuke Yamauchi

"Large-scale inhomogeneity of dark energy produced in the ancestor vacuum"

arXiv: 1901.11181 [astro-ph.CO]

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