発表論文

2024  2023  2022  2021  2020  2019  2018  2017  2016  2015  2014  2013 

【2024】
KOBE-COSMO-24-01
Ann Mukuno, Jiro Soda
"Chromo-natural warm inflation"
arXiv:2402.08849 [hep-th].

【2023】
KOBE-COSMO-23-11
Chong-Bin Chen
"Inflation with vector fields revisited: heavy entropy perturbations and primordial black holes"
arXiv:2312.06105 [astro-ph.CO].

KOBE-COSMO-23-10
Sugumi Kanno, Jiro Soda, Akira Taniguchi
"Search for high-frequency gravitational waves with Rydberg atoms"
arXiv:2311.03890 [gr-qc].

KOBE-COSMO-23-09
Taiga Miyachi, Jiro Soda, Junsei Tokuda
"Stochastic tunneling in de Sitter spacetime"
arXiv:2309.07440 [hep-th].

KOBE-COSMO-23-08
Chong-Bin Chen, Ziwei Wang, Siyi Zhou
"On the importance of heavy fields in pseudo-scalar inflation"
arXiv:2308.15872 [hep-th].

KOBE-COSMO-23-07
Hidetoshi Omiya, Kimihiro Nomura, Jiro Soda
"Hellings-Downs curve deformed by ultralight vector dark matter"
Phys. Rev. D 108, 104006 arXiv:2307.12624 [astro-ph.CO].

KOBE-COSMO-23-06
Yoshihiko Abe, Toshifumi Noumi, Kaho Yoshimura
"Black Hole Extremality in Nonlinear Electrodynamics: A Lesson for Weak Gravity and Festina Lente Bounds"
arXiv:2305.17062 [hep-th].

KOBE-COSMO-23-05
Katsuki Aoki, Toshifumi Noumi, Ryo Saito, Sota Sato, Satoshi Shirai, Junsei Tokuda, Masahito Yamazaki
"Gravitational Positivity for Phenomenologists: Dark Gauge Boson in the Swampland"
arXiv:2305.10058 [hep-ph].

KOBE-COSMO-23-04
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].

KOBE-COSMO-23-03
Takamasa Kanai, Kimihiro Nomura, Daisuke Yoshida
"Entropy Bound and a Geometrically Nonsingular Universe"
Phys. Rev. D 108, 104024 arXiv:2303.17121 [gr-qc].

KOBE-COSMO-23-02
Chong-Bin Chen, Jiro Soda
"Implications of multi-axion dark matter on structure formation"
arXiv:2303.00999 [astro-ph.CO].

KOBE-COSMO-23-01
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].

【2022】
KOBE-COSMO-22-20
Toshifumi Noumi, Junsei Tokuda
"Finite energy sum rules for gravitational Regge amplitudes"
arXiv:2212.08001 [hep-th].

KOBE-COSMO-22-19
Asuka Ito, Jiro Soda
"Exploring High Frequency Gravitational Waves with Magnons"
arXiv:2212.04094 [gr-qc].

KOBE-COSMO-22-18
Kimihiro Nomura, Kaishu Saito, Jiro Soda
"Observing axions through photon ring dimming of black holes"
Phys. Rev. D 107, 123505 arXiv:2212.03020 [hep-ph].

KOBE-COSMO-22-17
Sugumi Kanno, Ann Nakato, Jiro Soda, Kazushige Ueda
"Impact of quantum entanglement induced by magnetic fields on primordial gravitational waves"
arXiv:2211.05576 [hep-th].

KOBE-COSMO-22-16
Kohei Fujikura, Soichiro Hashiba, Jun'ichi Yokoyama
"Generation of neutrino dark matter, baryon asymmetry, and radiation after quintessential inflation"
arXiv:2210.05214 [hep-ph].

KOBE-COSMO-22-15
Toshifumi Noumi, Hibiki Satake
"Higher derivative corrections to black brane thermodynamics and the weak gravity conjecture"
arXiv:2210.02894 [hep-th].

KOBE-COSMO-22-14
Song He, Pak Hang Chris Lau, Zhuo-Yu Xian, Long Zhao
"Quantum chaos, scrambling and operator growth in TT deformed SYK models"
arXiv:2209.14936 [hep-th].

KOBE-COSMO-22-13
Sugumi Kanno, Ann Nakato, Jiro Soda, Kazushige Ueda
"Anisotropic warm inflation"
arXiv:2209.05776 [hep-th].

KOBE-COSMO-22-12
Yoshihiko Abe, Yu Hamada, Kota Saji, Koichi Yoshioka
"Quantum current dissipation in superconducting strings and vortons"
arXiv:2209.03223 [hep-ph].

KOBE-COSMO-22-11
Haipeng An, Xi Tong, Siyi Zhou
"Superheavy Dark Matter Production from Symmetry Restoration First-Order Phase Transition During Inflation"
arXiv:2208.14857 [hep-ph].

KOBE-COSMO-22-10
Justin Khoury, Toshifumi Noumi, Mark Trodden, Sam S. C. Wong
"Stability of Hairy Black Holes in Shift-Symmetric Scalar-Tensor Theories via the Effective Field Theory Approach"
arXiv:2208.02823 [hep-th].

KOBE-COSMO-22-09
Yong Cai, Ji Xu, Shuai Zhao, Siyi Zhou
"Perturbative unitarity and NEC violation in genesis cosmology"
arXiv:2207.11772 [gr-qc].

KOBE-COSMO-22-08
Sugumi Kanno, Jiro Soda, Kazushige Ueda
"Conversion of squeezed gravitons into photons during inflation"
arXiv:2207.05734 [hep-th].

KOBE-COSMO-22-07
Pak Hang Chris Lau, Toshifumi Noumi, Yuhei Takii, Kotaro Tamaoka
"Page curve and symmetries"
JHEP10(2022)015, arXiv:2206.09633 [hep-th].

KOBE-COSMO-22-06
Kimihiro Nomura, Daisuke Yoshida
"Implications of the singularity theorem for the size of a non-singular universe"
Phys. Rev. D 106, 124016, arXiv:2206.09404 [gr-qc].

KOBE-COSMO-22-05
Toshifumi Noumi, Sota Sato, Junsei Tokuda
"Phenomenological Motivation for Gravitational Positivity Bounds: A Case Study of Dark Sector Physics"
arXiv:2205.12835 [hep-th].

KOBE-COSMO-22-04
Wei-Ming Chen, Ming-Zhi Chung, Yu-tin Huang, Jung-Wook Kim
"Lense-Thirring effects from on-shell amplitudes"
arXiv:2205.07305 [hep-th].

KOBE-COSMO-22-03
Pak Hang Chris Lau, Chen-Te Ma
"Emergence of Time from Unitary Equivalence"
arXiv:2204.06366 [hep-th].

KOBE-COSMO-22-02
Haipeng An, Kun-Feng Lyu, Lian-Tao Wang, Siyi Zhou
"Gravitational Waves from an Inflation Triggered First-Order Phase Transition"
JHEP06(2022)050, arXiv:2201.05171 [astro-ph.CO].

KOBE-COSMO-22-01
Chong-Bin Chen, Jiro Soda
"Geometric Structure of Multi-Form-Field Isotropic Inflation and Primordial Fluctuations"
arXiv:2201.03160 [hep-th].

【2021】
KOBE-COSMO-21-19
Sugumi Kanno, Jiro Soda
"Squeezed quantum states of graviton and axion in the universe"
arXiv:2112.14496 [gr-qc].

KOBE-COSMO-21-18
Haipeng An, Kun-Feng Lyu, Lian-Tao Wang, Siyi Zhou
"Gravitational Waves from an Inflation Triggered First-Order Phase Transition"
arXiv:2201.05171 [astro-ph.CO].

KOBE-COSMO-21-17
Wei-Ming Chen, Ming-Zhi Chung, Yu-tin Huang, Jung-Wook Kim
"The 2PM Hamiltonian for binary Kerr to quartic in spin"
arXiv:2111.13639 [hep-th].

KOBE-COSMO-21-16
Kimihiro Nomura, Daisuke Yoshida
"Quasinormal modes of charged black holes with corrections from nonlinear electrodynamics"
Phys. Rev. D 105, 044006, arXiv:2111.06273 [gr-qc].

KOBE-COSMO-21-15
Masaya Amo, Tetsuya Shiromizu, Keisuke Izumi, Hirotaka Yoshino, Yoshimune Tomikawa
"Asymptotic behavior of null geodesics near future null infinity II: curvatures, photon surface and dynamically transversely trapping surface"
arXiv:2110.10917 [gr-qc].

KOBE-COSMO-21-14
Pengyuan Gao, Kazufumi Takahashi, Asuka Ito, Jiro Soda
"Cosmic No-hair Conjecture and Inflation with an SU(3) Gauge Field"
arXiv:2107.00264 [hep-th].

KOBE-COSMO-21-13
Kaishu Saito, Jiro Soda, Hirotaka Yoshino
"Universal $10^{20}$Hz stochastic gravitational waves from photon spheres of black holes"
Phys. Rev. D 104, 063040, arXiv:2106.05552 [gr-qc].

KOBE-COSMO-21-12
Chong-Bin Chen, Jiro Soda
"Anisotropic Hyperbolic Inflation"
JCAP 09 (2021) 026, arXiv:2106.04813 [hep-th].

KOBE-COSMO-21-11
Masaya Amo, Keisuke Izumi, Yoshimune Tomikawa, Hirotaka Yoshino, Tetsuya Shiromizu
"The asymptotic behavior of null geodesics near future null infinity: Significance of gravitational waves"
Phys. Rev. D 104, 064025, arXiv:2106.03150 [gr-qc].

KOBE-COSMO-21-10
Sugumi Kanno, Akira Matsumura, Jiro Soda
"Harvesting quantum coherence from axion dark matter"
arXiv:2105.12578 [quant-ph].

KOBE-COSMO-21-09
Kanji Nishii, Daisuke Yoshida
"String Excitation by Initial Singularity of Inflation"
JHEP 10 (2021) 025, arXiv:2105.12339 [hep-th].

KOBE-COSMO-21-08
Kimihiro Nomura, Daisuke Yoshida
"Past extendibility and initial singularity in Friedmann-Lemaître-Robertson-Walker and Bianchi I spacetimes"
JCAP 07 (2021) 047, arXiv:2105.05642 [gr-qc].

KOBE-COSMO-21-07
Toshifumi Noumi, Junsei Tokuda
"Gravitational Positivity Bounds on Scalar Potentials"
Phys. Rev. D 104, 066022, arXiv:2105.01436 [hep-th].

KOBE-COSMO-21-06
Sugumi Kanno, Jiro Soda, Junsei Tokuda
"Indirect detection of gravitons through quantum entanglement"
Phys. Rev. D 104, 083516, arXiv:2103.17053 [gr-qc].

KOBE-COSMO-21-05
Katsuki Aoki, Tran Quang Loc, Toshifumi Noumi, Junsei Tokuda
"Is the Standard Model in the Swampland?"
Phys.Rev.Lett. 127,091602, arXiv:2104.09682 [hep-th].

KOBE-COSMO-21-04
Mitsuhiro Kato, Kanji Nishii, Toshifumi Noumi, Toshiaki Takeuchi, Siyi Zhou
"Spiky strings in de Sitter space"
JHEP 05 (2021) 047, arXiv:2102.09746 [hep-th].

KOBE-COSMO-21-03
Tomonori Ikeda, Asuka Ito, Kentaro Miuchi, Jiro Soda, Hisaya Kurashige, Yutaka Shikano
"Axion search with quantum nondemolition detection of magnons"
arXiv:2102.08764 [hep-ex].

KOBE-COSMO-21-02
Taiga Miyachi, Jiro Soda
"False vacuum decay in a two-dimensional black hole spacetime"
Phys. Rev. D 103, 085009, arXiv:2102.02462 [gr-qc].

KOBE-COSMO-21-01
Suro Kim, Toshifumi Noumi, Keito Takeuchi, Siyi Zhou
"Perturbative unitarity in quasi-single field inflation"
JHEP 07 (2021) 018, arXiv:2102.04101 [hep-th].

【2020】
KOBE-COSMO-20-17
Toru Masuda, Hiroaki Matsunaga, Toshifumi Noumi
"Proof of new S-matrix formula from classical solutions in open string field theory"
PTEP 2022 (2022) no.1, 013B07, arXiv:2012.01290 [hep-th].

KOBE-COSMO-20-16
Naoya Kitajima, Jiro Soda, Yuko Urakawa
"Nano-Hz gravitational wave signature from axion dark matter"
Phys.Rev.Lett. 126,121301, arXiv: 2010.10990 [astro-ph.CO].

KOBE-COSMO-20-15
Toshifumi Noumi, Kaishu Saito, Jiro Soda, Daisuke Yoshida
"$O(d,d;\mathbb{Z})$ invariant Fierz-Pauli massive gravity"
arXiv: 2010.10871 [hep-th], Phys. Rev. D 103, 046011.

KOBE-COSMO-20-14
Asuka Ito, Jiro Soda, Masahide Yamaguchi
"Analytic formula for the dynamics around inflation end and implications on primordial gravitational waves"
JCAP 03 (2021) 033, arXiv:2009.03611 [astro-ph.CO].

KOBE-COSMO-20-13
Junsei Tokuda, Katsuki Aoki, Shin'ichi Hirano
"Gravitational positivity bounds"
JHEP 11 (2020) 054, arXiv:2007.15009 [hep-th].

KOBE-COSMO-20-12
Sugumi Kanno, Jiro Soda, Junsei Tokuda
"Noise and decoherence induced by gravitons"
Phys. Rev. D 103, 044017, arXiv:2007.09838 [hep-th].

KOBE-COSMO-20-11
Hiroshi Isono, Hoiki Madison Liu, Toshifumi Noumi
"Wavefunctions in dS/CFT revisited: principal series and double-trace deformations"
JHEP 04 (2021) 166, arXiv:2011.09479 [hep-th].

KOBE-COSMO-20-10
Gregory J. Loges, Toshifumi Noumi, Gary Shiu
"Duality and Supersymmetry Constraints on the Weak Gravity Conjecture"
JHEP 11 (2020) 008, arXiv:2006.06696 [hep-th].

KOBE-COSMO-20-09
Yuki Sakakihara, Daisuke Yoshida, Kazufumi Takahashi, Jerome Quintin
"Theories with limited extrinsic curvature and a nonsingular anisotropic universe"
Phys. Rev. D 102, 084004, arXiv:2005.10844 [gr-qc].

KOBE-COSMO-20-08
Kimihiro Nomura, Daisuke Yoshida, Jiro Soda
"Stability of magnetic black holes in general nonlinear electrodynamics"
arXiv:2004.07560 [gr-qc], Phys. Rev. D 101, 124026.

KOBE-COSMO-20-07
Asuka Ito, Jiro Soda
"A formalism for magnon gravitational wave detectors''
arXiv:2004.04646 [gr-qc], EPJ C 80, 545 (2020).

KOBE-COSMO-20-06
Sugumi Kanno, Jiro Soda
"Polarized initial states of primordial gravitational waves''
arXiv:2003.14073 [gr-qc].

KOBE-COSMO-20-05
Kazufumi Takahashi, Hayato Motohashi
"General Relativity solutions with stealth scalar hair in quadratic higher-order scalar-tensor theories"
JCAP 2006 (2020) no.06, 034 , arXiv:2004.03883 [gr-qc].

KOBE-COSMO-20-04
Stefano Andriolo, Tzu-Chen Huang, Toshifumi Noumi, Hirosi Ooguri, Gary Shiu
"Duality and Axionic Weak Gravity''
Phys.Rev.D 102 (2020) 4, 046008, arXiv:2004.13721 [hep-th].

KOBE-COSMO-20-03
Sunghoon Jung, TaeHun Kim, Jiro Soda, Yuko Urakawa
"Constraining the gravitational coupling of axion dark matter at LIGO''
Phys. Rev. D 102, 055013, arXiv:2003.02853 [hep-ph].

KOBE-COSMO-20-02
Aya Iyonaga, Kazufumi Takahashi, Tsutomu Kobayashi
"Extended Cuscuton as Dark Energy"
JCAP 2006 (2020) no.07, 004 , arXiv:2003.01934 [gr-qc].

KOBE-COSMO-20-01
Chong-Sun Chu, Jiro Soda, Daiske Yoshida
"Gravitational Waves in Axion Dark Matter"
arXiv:2002.04859 [gr-qc].

【2019】
KOBE-COSMO-19-21
Kimihiro Nomura, Asuka Ito, Jiro Soda
"Pulsar timing residual induced by ultralight vector dark matter"
arXiv:1912.10210 [gr-qc], Eur.Phys.J.C 80 (2020) 5, 419..

KOBE-COSMO-19-20
Takuya Morita, Jiro Soda
"Arrival Time Differences of Lensed Massive Gravitational Waves"
arXiv:1911.07435 [gr-qc].

KOBE-COSMO-19-19
Jerome Quintin, Daisuke Yoshida
"Cuscuton gravity as a classically stable limiting curvature theory"
arXiv:1911.06040 [gr-qc].

KOBE-COSMO-19-18
Kazufumi Takahashi, Daisuke Yoshida
"Ghost-free resummation of gravitational interactions of a 2-form gauge field"
Phys. Rev. D 101, 024049, arXiv:1910.12508 [gr-qc].

KOBE-COSMO-19-17
Emi Masaki, Arata Aoki, Jiro Soda
"Stability of Axion Dark Matter-Photon Conversion"
Phys. Rev. D 101, 043505, arXiv:1909.11470 [hep-ph].

KOBE-COSMO-19-16
Daisuke Yoshida, Jiro Soda,
"Birth of de Sitter Universe from time crystal"
arXiv:1909.05533 [hep-th].

KOBE-COSMO-19-15
Gregory J. Loges, Toshifumi Noumi, Gary Shiu
"Thermodynamics of 4D Dilatonic Black Holes and the Weak Gravity Conjecture"
Phys.Rev.D 102 (2020) 4, 046010, arXiv:1909.01352 [hep-th].

KOBE-COSMO-19-14
Jinn-Ouk Gong, Toshifumi Noumi, Gary Shiu, Jiro Soda, Kazufumi Takahashi, Masahide Yamaguchi
"Effective Field Theory of Anisotropic Inflation and Beyond"
JCAP 2008 (2020) no.08, 027 , arXiv:1910.11533 [hep-th].

KOBE-COSMO-19-13
Hiroshi Isono, Toshifumi Noumi, Gary Shiu
"Momentum space approach to crossing symmetric CFT correlators II: General spacetime dimension"
JHEP 10 (2019) 183, arXiv:1908.04572 [hep-th].

KOBE-COSMO-19-12
Toshifumi Noumi, Toshiaki Takeuchi, Siyi Zhou
"String Regge trajectory on de Sitter space and implications to inflation"
Phys. Rev. D.102, 126012, arXiv:1907.02535 [hep-th].

KOBE-COSMO-19-11
Asuka Ito, Yuki Sakakihara, Jiro Soda
"Accelerating Universe with a stable extra dimension in cuscuton gravity"
Phys. Rev. D 100, 063531, arXiv:1906.10363 [gr-qc].

KOBE-COSMO-19-10
Masaru Hongo, Suro Kim, Toshifumi Noumi, Atsuhisa Ota
"Effective Lagrangian for Nambu-Goldstone modes in nonequilibrium open systems"
Phys. Rev. D 103, 056020, arXiv:1907.08609 [hep-th].

KOBE-COSMO-19-09
Suro Kim, Toshifumi Noumi, Keito Takeuchi, Siyi Zhou
"Heavy Spinning Particles from Signs of Primordial Non-Gaussianities: Beyond the Positivity Bounds"
JHEP 1912 (2019) 107, arXiv:1906.11840 [hep-th].

KOBE-COSMO-19-08
Daisuke Yoshida
"2-form gauge theory dual to scalar-tensor theory"
arXiv:1906.02462 [hep-th].

KOBE-COSMO-19-07
Ryo Kato, Jiro Soda
"Search for ultralight scalar dark matter with NANOGrav pulsar timing arrays"
arXiv:1904.09143 [astro-ph.HE].

KOBE-COSMO-19-06
Kazufumi Takahashi, Hayato Motohashi, Masato Minamitsuji
"Linear stability analysis of hairy black holes in quadratic degenerate higher-order scalar-tensor theories: Odd-parity perturbations"
Phys. Rev. D 100, 024041, arXiv:1904.03554 [gr-qc].

KOBE-COSMO-19-05
Hiroshi Isono, Toshifumi Noumi, Toshiaki Takeuchi
"Momentum space conformal three-point functions of conserved currents and a general spinning operator"
JHEP 1905 (2019) 057, arXiv:1903.01110 [hep-th].

KOBE-COSMO-19-04
Asuka Ito, Aya Iyonaga, Suro Kim, Jiro Soda
"Dressed Power-law Inflation with Cuscuton"
Phys. Rev. D 99, 083502 , arXiv:1902.08663 [astro-ph.CO].

KOBE-COSMO-19-03
Wei-Ming Chen, Yu-tin Huang, Toshifumi Noumi, Congkao Wen
"Unitarity bounds on charged/neutral state mass ratio"
Phys. Rev. D 100, 025016 , arXiv:1901.11480 [hep-th].

KOBE-COSMO-19-02
Daiske Yoshida, Jiro Soda
“Quasinormal modes of $p$-forms in spherical black holes”
Phys. Rev. D 99, 044054, arXiv:1901.07723 [hep-th].

KOBE-COSMO-19-01
Asuka Ito, Tomonori Ikeda, Kentaro Miuchi, Jiro Soda
“Probing GHz Gravitational Waves with Graviton-magnon Resonance”
Eur. Phys. J. C 80, 179, arXiv:1903.04843 [gr-qc].

【2018】
KOBE-COSMO-18-10
Tsuneto Makoto, Asuka Ito, Toshifumi Noumi, Jiro Soda
"Searching for Bispectrum of Stochastic Gravitational Waves with Pulsar Timing Arrays"
JCAP 1903 (2019) no.03, 032 , arXiv:1812.10615 [gr-qc].

KOBE-COSMO-18-09
Sugumi Kanno, Jiro Soda
"Possible detection of nonclassical primordial gravitational waves with Hanbury Brown - Twiss interferometry"
arXiv:1810.07604 [hep-th].

KOBE-COSMO-18-08
Yuta Hamada, Toshifumi Noumi, Gary Shiu
"Weak Gravity Conjecture from Unitarity and Causality"
Phys. Rev. Lett. 123, 051601.
arXiv:1810.03637 [hep-th].

KOBE-COSMO-18-07
Naoya Kitajima, Jiro Soda, Yuko Urakawa
"Gravitational wave forest from string axiverse"
arXiv:1807.07037 [astro-ph.CO].

KOBE-COSMO-18-06
Hiroshi Isono, Toshifumi Noumi, Gary Shiu
"Momentum space approach to crossing symmetric CFT correlators"
JHEP 07 (2018) 136, arXiv:1805.11107 [hep-th].

KOBE-COSMO-18-05
Masaru Hongo, Suro Kim, Toshifumi Noumi, Atsuhisa Ota
"Effective field theory of time-translational symmetry breaking in nonequilibrium open system"
JHEP 1902 (2019) 131, arXiv:1805.06240 [hep-th].

KOBE-COSMO-18-04
Manami Noumi Hashi, Hiroshi Isono, Toshifumi Noumi, Gary Shiu, Pablo Soler
"Higgs Mechanism in Nonlocal Field Theories"
JHEP 08 (2018) 064, arXiv:1805.02676 [hep-th].

KOBE-COSMO-18-03
Yugo Abe, Takeo Inami, Keisuke Izumi, Tomotaka Kitamura, Toshifumi Noumi
"S-matrix Unitarity and Renormalizability in Higher Derivative Theories"
PTEP 2019 (2019) no.8, 083B06 arXiv:1805.00262 [hep-th].

KOBE-COSMO-18-02
Emi Masaki, Jiro Soda
"Conversion of Gravitons into Dark Photons in Cosmological Dark Magnetic Fields"
Phys. Rev. D 98, 023540, arXiv:1804.00458 [astro-ph.CO].

KOBE-COSMO-18-01
Stefano Andriolo, Daniel Junghans, Toshifumi Noumi, Gary Shiu
"A Tower Weak Gravity Conjecture from Infrared Consistency"
Fortsch.Phys. 66 (2018) no.5, 1800020, arXiv:1802.04287 [hep-th].

【2017】
KOBE-COSMO-17-15
Asuka Ito, Jiro Soda
"Anisotropic Constant-roll Inflation"
Eur.Phys.J. C78 (2018) no.1, 55, arXiv:1710.09701 [hep-th].

KOBE-COSMO-17-14
Daiske Yoshida, Jiro Soda
"Electromagnetic waves propagating in the string axiverse"
PTEP 2018 (2018) no.4, 041E01, arXiv:1710.09198 [hep-th].

KOBE-COSMO-17-13
Jiro Soda, Yuko Urakawa
"Cosmological imprints of string axions in plateau"
arXiv:1710.00305 [astro-ph.CO].

KOBE-COSMO-17-12
Syksy Räsänen, Pyry Wahlman
"Higgs inflation with loop corrections in the Palatini formulation"
JCAP 11 (2017) 047, arXiv:1709.07853 [astro-ph.CO].

KOBE-COSMO-17-11
Francesco Montanari, Syksy Räsänen
"Backreaction and FRW consistency conditions"
JCAP 11 (2017) 032, arXiv:1709.06022 [astro-ph.CO].

KOBE-COSMO-17-10
Daiske Yoshida, Jiro Soda
"Exploring the string axiverse and parity violation in gravity with gravitational waves"
arXiv:1708.09592 [gr-qc].

KOBE-COSMO-17-09
Jia-Jia Geng, Bao-Fei Li, Jiro Soda, Anzhong Wang, Qiang Wu, Tao Zhu
"Schwinger Pair Production by Electric Field Coupled to Inflaton"
JCAP 02 (2018) 018, arXiv:1706.02833 [gr-qc].

KOBE-COSMO-17-08
Sugumi Kanno, Jiro Soda
"Infinite violation of Bell inequalities in inflation"
Phys. Rev. D 96, 083501 (2017), arXiv:1705.06199 [hep-th].

KOBE-COSMO-17-07
Vitor Cardoso, Tsuyoshi Houri, Masashi Kimura
"Mass ladder operators from spacetime conformal symmetry"
Phys. Rev. D 96, 024044 (2017), arXiv:1706.07339 [hep-th].

KOBE-COSMO-17-06
Daiske Yoshida, Jiro Soda
"Electromagnetic Memory Effect Induced by Axion Dark Matter"
Phys. Rev. D 96, 064005 (2017), arXiv:1704.04169 [gr-qc].

KOBE-COSMO-17-05
Tsuyoshi Houri, Kentaro Tomoda, Yukinori Yasui
"On integrability of the Killing equation"
arXiv:1704.02074 [gr-qc].

KOBE-COSMO-17-04
Tommi Markkanen, Sami Nurmi, Syksy Räsänen, Vincent Vennin
"Narrowing the window of inflationary magnetogenesis"
JCAP 06 (2017) 035, arXiv:1704.01343 [astro-ph.CO].

KOBE-COSMO-17-03
Arata Aoki, Jiro Soda
"Nonlinear resonant oscillation of gravitational potential induced by ultralight axion in f(R) gravity"
Phys. Rev. D 96, 023534 (2017), arXiv:1703.03589 [astro-ph.CO].

KOBE-COSMO-17-02
Emi Masaki, Arata Aoki, Jiro Soda
"Photon-axion conversion, magnetic field configuration, and polarization of photons"
Phys. Rev. D 96, 043519 (2017), arXiv:1702.08843 [astro-ph.CO].

KOBE-COSMO-17-01
Luca V. Delacretaz, Toshifumi Noumi, Leonardo Senatore
"Boost breaking in the EFT of inflation"
JCAP 02 (2017) 034, arXiv:1512.04100 [hep-th].

【2016】
KOBE-COSMO-16-14
Tsuyoshi Houri, Makoto Sakamoto, Kentaro Tatsumi
"Spectral intertwining relations in exactly solvable quantum mechanical systems"
Prog. Theor. Exp. Phys. (2017) 063A01, arXiv:1701.04307 [quant-ph].

KOBE-COSMO-16-13
Takehiko Asaka, Satoshi Iso, Hikaru Kawai, Kazunori Kohri, Toshifumi Noumi, Takahiro Terada
"Reinterpretation of the Starobinsky model"
PTEP (2016) 123E01, arXiv:1507.04344 [hep-th].

KOBE-COSMO-16-12
Tetsuji Kimura, Anupam Mazumdar, Toshifumi Noumi, Masahide Yamaguchi
"Nonlocal N=1 Supersymmetry"
JHEP 10 (2016) 022, arXiv:1608.01652 [hep-th].

KOBE-COSMO-16-11
Hiroshi Isono, Toshifumi Noumi, Gary Shiu, Sam S.C. Wong, Siyi Zhou
"Holographic non-Gaussianities in general single-field inflation"
JHEP 12 (2016) 028, arXiv:1610.01258 [hep-th].

KOBE-COSMO-16-10
Arata Aoki, Jiro Soda
"Detecting ultralight axion dark matter wind with laser interferometers"
Int. J. Mod. Phys. D 26, 1750063 (2017), arXiv:1608.05933 [astro-ph.CO].

KOBE-COSMO-16-09
Sugumi Kanno, Jonathan P. Shock, Jiro Soda
"Quantum discord in de Sitter space"
Phys. Rev. D 94, 125014 (2016), arXiv:1608.02853 [hep-th].

KOBE-COSMO-16-08
Takahisa Igata, Tsuyoshi Houri, Tomohiro Harada
"Self-similar motion of a Nambu-Goto string"
Phys. Rev. D 94, 064029 (2016), arXiv:1608.03698 [gr-qc].

KOBE-COSMO-16-07
Asuka Ito, Jiro Soda
"Primordial Gravitational Waves Induced by Magnetic Fields in Ekpyrotic Scenario"
Phys. Lett. B 771 (2017) 415, arXiv:1607.07062 [hep-th].

KOBE-COSMO-16-06
Ippei Obata, Jiro Soda
"Oscillating Chiral Tensor Spectrum from Axionic Inflation"
Phys. Rev. D 94, 044062 (2016), arXiv:1607.01847 [astro-ph.CO].

KOBE-COSMO-16-05
Arata Aoki, Tsuyoshi Houri, Kentaro Tomoda
"Rational first integrals of geodesic equations and generalised hidden symmetries"
Class. Quant. Grav. 33, 195003 (2016), arXiv:1605.08955 [gr-qc].

KOBE-COSMO-16-04
Asuka Ito, Jiro Soda
"MHz Gravitational Waves from Short-term Anisotropic Inflation"
JCAP 04 (2016) 035, arXiv:1603.00602 [hep-th].

KOBE-COSMO-16-03
Ippei Obata, Jiro Soda
"Chiral Primordial Gravitational Waves from Dilaton Induced Delayed Chromo-natural Inflation"
Phys. Rev. D 93, 123502 (2016), arXiv:1602.06024 [hep-th].

KOBE-COSMO-16-02
Arata Aoki, Jiro Soda
"Pulsar timing signal from ultralight axion in f(R) theory"
Phys. Rev. D 93, 083503 (2016), arXiv:1601.03904 [hep-ph].

【2015】
KOBE-COSMO-16-01
Ryo Kato, Jiro Soda
"Probing circular polarization in stochastic gravitational wave background with pulsar timing arrays"
Phys. Rev. D 93, 062003 (2016), arXiv:1512.09139 [gr-qc].

Getbogi Hikmawan, Jiro Soda, Agus Suroso, Freddy P. Zen
"No-Go Theorem for Gauss-Bonnet Inflation without Inflaton Potential"
Phys. Rev. D 93, 068301 (2016), arXiv:1512.00222 [hep-th].

Masato Nozawa, Tsuyoshi Houri
"Killing-Yano tensor, supersymmetry of the self-dual Plebanski-Demianski solution"
Class. Quant. Grav. 33, 125008 (2016), arXiv:1510.07470 [hep-th].

KOBE-TH-15-14
Daiske Yoshida, Jiro Soda
"Quasi-Normal Modes of Black Holes in Lovelock Gravity"
Phys. Rev. D 93, 044024 (2016), arXiv:1512.05865 [gr-qc].

KOBE-TH-15-10
Tsuyoshi Houri, Yoshiyuki Morisawa, Kentaro Tomoda
"Antisymmetric tensor generalizations of affine vector fields"
J. Math. Phys. 57, 022501 (2016), arXiv:1510.03538 [gr-qc].

KOBE-TH-15-08
Kei Yamamoto, Koji Sato, Eiji Saitoh, Hiroshi Kohno
"Anomalous Hall effect driven by dipolar spin waves in uniform ferromagnets"
Phys. Rev. B 92, 140408 (2015), arXiv:1509.02284 [cond-mat.mtrl-sci].

KOBE-TH-15-05
Asuka Ito, Jiro Soda
"Designing Anisotropic Inflation with Form Fields"
Phys. Rev. D 92, 123533 (2015), arXiv:1506.02450 [hep-th].

KOBE-TH-15-04
Yuki Sakakihara, Jiro Soda
"Primordial Gravitational Waves in Bimetric Gravity"
JCAP 1509 (2015) 09, 015, arXiv1504.04969 [hep-th].

【2014】
KOBE-TH-14-14
Ippei Obata, Takashi Miura, Jiro Soda
"Chromo-Natural Inflation in the Axiverse"
Phys. Rev. D 92, 063516 (2015), arXiv:1412.7620 [hep-ph].

KOBE-TH-14-12
Sugumi Kanno, Jonathan P. Shock, Jiro Soda
"Entanglement negativity in the multiverse"
JCAP 1503 (2015) 03, 015, arXiv1412.2838 [hep-th].

KOBE-TH-14-10
Jiro Soda
"Anisotropic Power-law Inflation: A counter example to the cosmic no-hair conjecture"
arXiv:1410.8643 [gr-qc].

KOBE-TH-14-09
Sigbjorn Hervik, Anders Haarr, Kei Yamamoto
"Degenerate pseudo-Riemannian metrics"
arXiv:1410.4347 [math-ph].

KOBE-TH-14-08
Tsuyoshi Houri, Yukinori Yasui,
"A simple test for spacetime symmetry"
Class. Quant. Grav. 32:055002 (2015), arXiv:1410.1023 [gr-qc].

KOBE-TH-14-05
Ippei Obata, Takashi Miura, Jiro Soda
"Dynamcs of Electroweak Gauge Fields during, after Higgs Inflation"
Phys. Rev. D 90, 045005 (2014), arXiv:1405.3091 [hep-ph]..

KOBE-TH-14-04
Sugumi Kanno, Jeff Murugan, Jonathan Shock, Jiro Soda
"Entanglement entropy of $\alpha$-vacua in de Sitter space"
JHEP 07 (2014) 072, arXiv:1404.6815 [hep-th].

KOBE-TH-14-01
Markus B. Frob, Jaume Garriga, Sugumi Kanno, Misao Sasaki, Jiro Soda, Takahiro Tanaka, Alexander Vilenkin
"Schwinger effect in de Sitter space"
JCAP 1404 (2014) 009, arXiv:1401.4137 [hep-ph].

【2013】
KOBE-TH-13-09
J.Ohashi, Jiro Soda, S. Tsujikawa
"Anisotropic power-law k-inflation"
Phys. Rev. D 88, 103517 (2013), arXiv:1310.3053 [hep-th].