Semtember 12 (Monday) 2022, 10:00-12:00 JST
Speaker: Kotaro Tamaoka (Nihon University)(slides)
Title: Non-Equilibrating a Black Hole with Inhomogeneous Quantum Quench
Abstract: We study non-equilibrium processes in AdS/CFT induced by quantum quench using spatially inhomogeneous Hamiltonians, called the sine-square-deformed (SSD) Hamiltonians. When the CFT admits a holographic description, these quenches induce inhomogeneous deformations of the black hole in the AdS bulk. In particular, at late enough times after the quench by the SSD Hamiltonian, the horizon of the bulk black hole asymptotically "touches" the boundary. If time permits, we also discuss several implications on the boundary CFT side and possible applications to quantum many-body systems in the real experimental setup.
arXiv: 2112.14388
Speaker: Junsei Tokuda (Kobe University)(slides)
Title: Phenomenological Motivation for Gravitational Positivity Bounds: A Case Study of Dark Sector Physics
Abstract: Same as the arXiv version
arXiv: 2205.12835
Speaker: Daisuke Yamauchi (Kanagawa University)(slides)
Title: Signature of primordial non-Gaussianity on 21-cm power spectrum from dark ages
arXiv: 2203.15599
Speaker: Yuki Osawa (Nagoya University)(slides)
Title: Particle Creation and Entanglement in Dispersive Model with Step Velocity Profile
arXiv: 2204.08684
Speaker: Daiki Yamaguchi (Kindai University)(slides)
Title: Running Newton Coupling, Scale Identification and Black Hole Thermodynamics
arXiv: 2204.09892
Speaker: Toshiya Namikawa (Kavli IPMU)(slides)
Title: Finding Evidence for Inflation and the Origin of Galactic Magnetic Fields with CMB Surveys
arXiv: 2201.02204
Speaker: Youka Kaku (Nagoya University)(slides)
Title: Creating stars orbiting in AdS
arXiv: 2202.07807
Speaker: Kai Murai (ICRR, University of Tokyo)(slides)
Title: Gravitational waves detectable in laser interferometers from axion-SU(2) inflation
arXiv: 2203.15273
Speaker: Akihiro Ishibashi (Kindai Univ.)(slides)
Title: The averaged null energy condition on holographic evaporating black holes
arXiv: 2111.05151
Speaker: Tetsuya Hashimoto (National Chung Hsing Univ.)(slides)
Title: Upper limits on Einstein's weak equivalence principle placed by uncertainties of dispersion measures of fast radio bursts
arXiv: 2111.11447
Speaker: Hidetoshi Omiya (TAP, Kyoto Univ.)(slides)
Title: Adiabatic evolution of the self-interacting axion field around rotating black holes
arXiv: 2201.04382
Speaker: Sousuke Noda (Miyakonojo College)(slides)
Title: Alfvénic superradiance for a monopole magnetosphere around a Kerr black hole
arXiv: 2111.01149
Speaker: Kazufumi Takahashi (YITP, Kyoto Univ.)(slides)
Title: Invertible disformal transformations with higher derivatives
arXiv: 2111.11634
Speaker: Takuya Takahashi (TAP, Kyoto Univ.)(slides)
Title: Axion cloud evaporation during inspiral of black hole binaries
arXiv: 2112.05774
Speaker: Kanji Nishii (Kobe Univ.) (slides)
Title: Spiky strings in de Sitter space
arXiv: 2102.09746
Speaker: Takahisa Igata (KEK) (slides)
Title: Photon emission from inside the innermost stable circular orbit
arXiv: 2102.13427
Speaker: Beatriz Elizaga Navascués (Waseda Univ.) (slides)
Title: Primordial perturbations in kinetically dominated regimes of general relativity and hybrid quantum cosmology
arXiv: 2106.05628
Speaker: Yasutaka Koga (Nagoya Univ.) (Slide)
Title: Photon surfaces in less symmetric spacetimes
arXiv: https://arxiv.org/abs/2011.10234
Speaker: So Okano (Tokyo Institute of Technology) (Slide)
Title: When does the Schwinger Preheating Occur?
arXiv: https://arxiv.org/abs/2105.13180
Speaker: Priti Gupta (Kyoto Univ.) (Slide)
Title: Importance of tidal resonances in extreme-mass-ratio inspirals
arXiv: https://arxiv.org/abs/2104.03422
Speaker: Akira Matsumura (Kyushu University) (Slide)
Title: Field-induced entanglement in spatially superposed objects
arXiv: https://arxiv.org/abs/2102.10792
Speaker: Hayato Motohashi (Kogakuin University) (Slide)
Title: Exact solution for wave scattering from black holes
arXiv: https://arxiv.org/abs/2103.10802
Speaker: Hiroki Asami (Nagoya University) (Slide)
Title: Thermal equilibrium states and instability of self-gravitating particles in an asymptotically AdS spacetime
arXiv: https://arxiv.org/abs/2103.13714
Speaker: Taiga Miyachi (Kobe University) (Slide)
Title: False vacuum decay in a two-dimensional black hole spacetime
arXiv: https://arxiv.org/abs/2102.02462
Speaker: Taishi Ikeda (Sapienza University of Rome) (Slide)
Title: Black-hole microstate spectroscopy: ringdown, quasinormal modes, and echoes
arXiv: https://arxiv.org/abs/2103.10960
Speaker: Yusuke Mikura (Nagoya University) (Slide)
Title: Minimal k-inflation in light of the conformal metric-affine geometry
arXiv: https://arxiv.org/abs/2103.13045
Speaker: Keitaro Tomikawa (Rikkyo Univ.) (Slide)
Title: Perturbations and quasi-normal modes of black holes with time-dependent scalar hair in shift-symmetric scalar-tensor theories
arXiv: https://arxiv.org/abs/2101.03790
Speaker: Teruaki Suyama (Tokyo Institute of Technology) (Slide)
Title: Revisiting non-Gaussianity in non-attractor inflation models in the light of the cosmological soft theorem
arXiv: https://arxiv.org/abs/2101.10682
Speaker: Suro Kim (Kobe Univ.) (Slide)
Title: Perturbative unitarity in quasi-single field inflation
arXiv: https://arxiv.org/abs/2102.04101
Mar 29 (Mon) 2021, 10:00 JST (UTC+0900)
Speaker: Katsuki Aoki (YITP, Kyoto Univ.)
Title: Non-linearly ghost-free higher curvature gravity (Slide)
arXiv: https://arxiv.org/abs/2009.11739
Speaker: Hidetoshi Omiya (Kyoto Univ.)
Title: Renormalization group analysis of superradiant growth of self-interacting axion cloud (Slide)
arXiv: https://arxiv.org/abs/2012.03473
Speaker: Keisuke Izumi (Nagoya Univ.)
Title: Area bound for surfaces in generic gravitational field (Slide)
arXiv: https://arxiv.org/abs/2101.03860
Jan. 26 (Tue.) 2021, 13:00 JST (UTC+0900)
Speaker: Yuto Minami (RCNP)
Title: New Extraction of the Cosmic Birefringence from the Planck 2018 Polarization Data (Slide)
ArXiv No: 2011.11254
Speaker: Takuya Katagiri (Rikkyo Univ.)
Title: Instabilities of charged anti-de Sitter black holes (Slide)
ArXiv No: 2006.10301
Speaker: Valeri Vardanyan (IPMU)
Title: Cross-correlation of the astrophysical gravitational-wave background with galaxy clustering (Silde)
ArXiv No: 1910.08353
Dec. 16 (Wed.) 2020, 10:00 JST (UTC+0900)
Speaker: Keisuke Nakashi (Rikkyo Univ.)
Title: Towards rotating non-circular black holes in string-inspired gravity (slide)
ArXiv no.: 2008.04003
Speaker: Shin'ichi Hirano (Nagoya Univ.)
Title: UV sensitive one-loop matter power spectrum in degenerate higher-order scalar-tensor theories (slide)
ArXiv no.: 2008.02798
Speaker: Shao-Jiang Wang (KIAS/Tufts)
Title: Effective picture of bubble expansion (slide)
ArXiv no.: 2011.11451
Oct. 22 (Thu.) 2020, 16:00 JST (UTC+0900)
Speaker: Yasuyuki Hatsuda (Rikkyo Univ.)
Title: An alternative to the Teukolsky equation (slide)
ArXiv no.: 2007.07906
Speaker: Yuichiro Tada (Nagoya Univ.)
Title: A manifestly covariant theory of multifield stochastic inflation in phase space (slide)
ArXiv no.: 2008.07497
Speaker: Kei Yamada (Kyoto Univ.)
Title: Resonant gravitational waves in dynamical Chern-Simons-axion gravity (slide)
ArXiv no.: 2008.02764
Sep. 23(Wed.) 2020, 10:00 JST (UTC+0900)
Speaker: Chul-Moon Yoo (Nagoya Univ.)
Title: Abundance of Primordial Black Holes in Peak Theory for an Arbitrary Power Spectrum (slide)
ArXiv no.: 2008.02425
Speaker: Hiromasa Nakatsuka (ICRR, Univ. of Tokyo)
Title: Probing Extremely Light Axion-like Particles via CMB Polarization (slide)
ArXiv no.: 2008.02473
Speaker: Junsei Tokuda (Kobe Univ.)
Title: Gravitational positivity bounds (slide)
ArXiv no.: 2007.15009