Nagoya University
Theoretical Elementary Particle Physics Laboratory

E-lab Seminar


Date Mon Jun 12 2023
Speaker Shoto Aoki
(Osaka Univ.)
Title Curved domain-wall fermion and its anomaly inflow
Abstract We investigate the effect of U(1) gauge field on lattice fermion systems with a curved domain-wall mass term. In the same way as the conventional flat domain-wall fermion, the chiral edge modes appear localized at the wall, whose Dirac operator contains the induced gravitational potential as well as the U(1) vector potential. In the case of S1 domain-wall fermion on a twodimensional flat lattice, we find a competition between the Aharonov-Bohm(AB) effect and gravitational gap in the Dirac eigenvalue spectrum, which leads to anomaly of the time-reversal (T) symmetry. Our numerical result shows a good consistency with the Atiyah-Patodi-Singer index theorem on a disk inside the S1 domain-wall, which describes the cancellation of the T anomaly between the bulk and edge. When the U(1) flux is squeezed inside one plaquette, and the AB phase takes a quantized value π mod 2 π Z, the anomaly inflow drastically changes: the strong flux creates another domain-wall around the flux to make the two zero modes coexist. This phenomenon is also observed in the S2 domain-wall fermion in the presence of a magnetic monopole. We find that the domain-wall creation around the monopole microscopically explains the Witten effect.
Date Mon Jun 26 2023
Speaker Akihiro Ishibashi
(Kindai University)
Title Semiclassical Einstein equations from holography and boundary dynamics
Abstract We consider how to formulate semiclassical problems in the context of the AdS/CFT correspondence, based on the proposal of Compere and Marolf [arXiv:0805.1902]. Our prescription involves the effective action with self-action term for boundary dynamical fields, which can be viewed as imposing mixed boundary conditions for the gravity dual. We derive the semiclassical Einstein equations sourced by boundary CFT stress-energy tensor. Analyzing perturbations of the holographic semiclassical Einstein equations, we find a universal parameter which controls the contribution from boundary CFTs and specifies dynamics on the AdS boundary. As a simple example, we examine the semiclassical Einstein equations in 3-dimensions with 4-dimensional AdS gravity dual, and show that the boundary BTZ black hole with vanishing expectation value of the stress-energy tensor becomes unstable due to the backreaction from quantum stress-energy tensor when the parameter exceeds a certain critical value. This talk is based on the joint work with K. Maeda and T. Okamura, 2301.12170 [hep-th]
Date Tue Jul 04 2023
Speaker Shanming Ruan
Title Complexity=Anything: Singularity Probes
Abstract We investigate how the complexity=anything observables can be used to investigate the interior geometry of AdS black holes. In particular, we illustrate how the flexibility of the complexity=anything approach allows us to systematically probe the geometric properties of black hole singularities. We contrast our results for the AdS Schwarzschild and AdS Reissner-Nordstrom geometries, i.e., for uncharged and charged black holes, respectively. In the latter case, the holographic complexity observables can only probe the interior up to the inner horizon.
Date Mon Jul 24 2023
Speaker Kazuki Tanaka
(Niigata University)
Title TBA
Abstract TBA


Date Speaker Title Slide/Video
6/5 Tomohiro Abe
(Tokyo University of Science)
A pseudo-Nambu-Goldstone dark matter model and direct detection experiments
5/29 Kanato Goto
How do wormholes emerge from quantum gravity?
5/22 Naoya Kitajima
(Tohoku University)
Emission of dark photons and gravitational waves from cosmic string network
5/15 Shinya Kanemura
(Osaka Univ.)
Electroweak baryogenesis in the aligned two Higgs doublet model
5/8 Takumi Kuwahara
(Peking Univ. )
Quantum Theory of Dark Matter Scattering
5/1 Masaki Tezuka
(Kyoto University)
Binary-coupling sparse SYK model video1
4/24 Kazuhiro Sakai
(Meiji-gakuin University)
Spectral form factor in the tau-scaling limit slide1
4/17 Yuya Kusuki
AdS/BCFT from Bootstrap slide1 slide2
2/28 Ryuichiro Kitano
μTRISTAN slide1
2/7 Kazuya Yonekura
(Tohoku University)
Cosmic strings from pure Yang-Mills theory
2/1 Kazuki Sakurai
(Warsaw Univ.)
Quantum information and CP measurement in H->tau,tau at future lepton colliders slide1
1/18 Kentarou Mawatari
(Iwate University)
Helicity amplitudes without gauge cancellation in the Feynman-diagram gauge slide1
1/10 Joan Simon
(Edinburgh U)
A proposal for 3d quantum gravity & its bulk factorization
Date Speaker Title Slide/Video
12/20 Masahiro Ibe
Gauge kinetic mixing and dark topological defects
12/6 Ofri Telem
(Hebrew U)
Dressed vs. Pairwise States, and the Geometric Phase of Monopoles and Charges slide1
11/29 Bin Guo
(CEA Saclay)
What is the CFT dual of BPS black hole microstates? slide1
11/22 Yusuke Taki
(Yukawa Institute)
Pseudo Entropy in dS/CFT and Time-like Entanglement Entropy
11/15 Satoshi Iso
Complementarity and Propagation of Decoherence in relativistic quantum measurements
11/11 Pierre Heidmann
(Johns Hopkins U)
Schwarzschild-like Topological Solitons in Gravity slide1
11/1 Yuta Hamada
Swampland Conjectures slide1
10/18 David Dudal
(KU Leuven)
Looking beyond the Landau gauge Gribov horizon
10/4 Hitoshi Murayama
(Berkeley, Kavli-IPMU)
Solving strong dynamics of gauge theories using supersymmetry and anomaly mediation
7/26 Norihiro Iizuka
(Osaka Univ.)
Defining entanglement without tensor factoring: a Euclidean hourglass prescription slide1
7/11 Shinji Mukohyama
On the assumptions leading to the information loss paradox slide1
7/4 Muneto Nitta
(Keio University)
Stable Z-strings with topological polarization in two Higgs doublet model (with a review of topological solitons in this model)
6/28 Ryosuke Sato
(Osaka Univ.)
Spontaneous CP violation & Baryon asymmetry slide1
6/21 Masazumi Honda
(YITP, Kyoto U)
String theory, N=4 SYM and Riemann hypothesis
6/14 Mitsuhiro Nishida
Scaling exponents of Mellin amplitudes for deriving bounds on flat space S-matrices from bounds on chaos slide1
6/6 Satoshi Mishima
New physics interpretation of W-boson mass anomaly slide1
5/30 Kantaro Ohmori
(University of Tokyo)
Non-invertible symmetry in 3+1-dimensions
5/24 Takashi Kaneko
(KEK and KMI)
$B \to D^*\ell\nu$ decay on the lattice
5/23 Shuhei Iguro
(Karlsruhe Institute of Technology)
Collider test of the Lepton portal to sub-GeV dark matter
5/16 Yohei Ema
(Minnesota University)
CKM and muon EDM contributions to atomic/molecular EDMs video1
5/10 Wen Yin
(Tohoku University)
Implications of Hubble tensions for very early universe cosmology slide1
4/26 Kenta Suzuki
(Yukawa Inst.)
JT Gravity Limit of Liouville CFT and Matrix Model video1
4/18 Volodymyr Takhistov
Exploring Fundamental Physics with Atmospheric Collider and Beyond video1
4/12 Masamichi Miyaji
(Nagoya U)
Probing Gravity using Correlation Measures slide1
4/11 Sinya Aoki
(YITP, Kyoto U)
Conserved non-Noether charge in general relativity: Physical definition vs. Noether's 2nd theorem slide1
2/8 Juan Carlos Vasquez
(Univ. of Massachusetts, Amherst)
The QCD Adler function and the muon g-2 anomaly from Renormalons slide1
2/2 Tatsuma Nishioka
(Yukawa Institute)
CFT duals of three-dimensional de Sitter gravity slide1
1/18 Shohei Okawa
(Universitat de Barcelona)
Long-range axion forces and hadronic CP violation slide1
1/11 Dorin Weissman
Hard scattering and holographic QCD
Date Speaker Title Slide/Video
12/22 Toshifumi Noumi
(Kobe Univ.)
Gravitational Positivity Bounds and the Standard Model
12/21 Amon Furuichi
12/15 Kazushi Yamashiro
(Shizuoka University)
Target space entanglement in a matrix model for the bubbling geometry
12/14 Yukihiro Kanda
12/7 Hiromasa Takaura
Perturbative computation of the electron g-2 using stochastic method
11/30 Shota Komatsu
Three tales of de Sitter slide1
11/17 Juntaro Wada
(Univ. of Tokyo)
Probing the Lμ-Lτ Gauge Boson at the MUonE Experiment slide1
11/9 Jiro Soda
(Kobe University)
Decoherence induced by gravitons
11/2 Yuki Hayashi
(Tohoku Univ.)
Renormalon subtraction using Fourier transform — towards precise QCD calculation slide1
10/27 Yu Zhang
Correlated Dirac Eigenvalues and Axial Anomaly in Chiral Symmetric QCD slide1
10/19 Abhiram Kidambi
Towards localization of 1/4-BPS black holes in N = 4 supergravity: Lessons from the microscopic side
10/12 Kei Yagyu
(Osaka Univ.)
Dark sector as origin of tiny lepton masses and new sources of (g-2)_mu slide1
10/5 Minoru Eto
(Yamagata Univ.)
Non-Abelian vortices and magnetic monopoles in 2 Higgs doublet model slide1
7/20 Satoshi Yamaguchi
(Osaka University)
Supersymmetric quantum field theory with exotic symmetry in 3+1 dimensions and fermionic fracton phases
7/13 Kantaro Ohmori
(Univ. of Tokyo)
Symmetries and Strings of Adjoint QCD2
7/7 Takeshi Kobayashi
(Nagoya Univ.)
6/29 Kin-ya Oda
(Tokyo Woman's Christian U.)
Dynamically emergent gravity from hidden local Lorentz symmetry
6/22 Shoji Hashimoto
Inclusive processes from lattice QCD
6/15 Simon Ross
(Durham U)
AdS solitons with magnetic flux - degenerate supersymmetric solutions
6/8 Kyohei Mukaida
Baryo/Leptogenesis from Axion Inflation slide1
6/1 Lento Nagano
(ICEPP, U of Tokyo)
Digital quantum simulation for screening and confinement in gauge theory with a topological term
5/25 Yuichiro Tada
(Nagoya Univ. C-lab)
Self-introduction, or a biased view of what theoretical cosmologists are recently interested in slide1
5/17 Hiroshi Suzuki
(Kyushu U)
Gradient flow exact renormalization group
5/12 Qaisar Shafi
(Bartol research institute)
Topological Structures in Unified Theories
5/10 Tomohiro Fujita
(Waseda Univ.)
Hunting Axion like Particles by Observations and Experiments slide1
4/28 Masamichi Miyaji
(UC Berkley)
Spectrum of End of the World Branes in Holographic BCFTs
4/19 Wen Yin
(Tohoku Univ.)
Kilobyte cosmic birefringence and ALP domain walls without strings slide1
4/13 Sotaro Sugishita
(Nagoya U)
IR finite S-matrix by gauge invariant dressed states
2/24 Yoshiki Yatagai
(Osaka City U.)
Fermion Mass Hierarchy in Grand Gauge-Higgs Unification with Localized Gauge Kinetic Terms slide1
2/10 Yu Hamada
(Kyoto Univ.)
Gravitational instantons and anomalous chiral symmetry breaking slide1
2/3 Norihiro Iizuka
(Osaka U)
Wormholes and holographic decoherence
1/26 ‪Martin Jung
(INFN Torino)
Standard Model predictions and new physics in b to c transitions slide1
1/20 Kazunori Nakayama
(Univ. of Tokyo)
Condensed matter physics for dark matter detection slide1
1/13 Kazuhisa Ogawa
(Hokkaido U)
Complex "variance" in quantum measurement for pre- and post-selected systems
Date Speaker Title Slide/Video
12/15 Yosuke Takubo
LHC-FASER実験における新粒子探索 slide1
12/11 Kaori Fuyuto
(Los Alamos)
Fundamental symmetry tests in the lepton sector
12/2 Naoki Sasakura
(YITP, Kyoto U)
Exploring quantum canonical tensor model for N = 1 and beyond
11/18 Masashi Aiko
(Osaka Univ.)
New scenario for aligned Higgs couplings originated from the twisted custodial symmetry at high energies
11/4 Daisuke Kadoh
(NCTS, National Tsing-Hua Univ.)
Tensor renormalization group on triad networks
10/28 Seishi Enomoto
(Sun Yat-sen University)
Matter-antimatter asymmetric production due to oscillating background field
10/21 Kazumi Okuyama
(Shinshu U)
Quenched free energy in random matrix model
10/7 Takumi Kuwahara
(IBS -> Peking U.)
Maximally self-interacting dark matter: A composite asymmetric dark matter scenario
7/27 Shuichi Yokoyama
(YITP Kyoto)
Flow equation, black hole, and singularity slide1
7/21 Kunimasa Miyazaki
(Nagoya U)
Anomalous and Glassy Dynamics of a Simple Active Matter
7/16 Masaaki Tomii
(Connecticut U.)
Direct CP violation and the \Delta I = 1/2 rule in K \to \pi\pi decay from the Standard Model
7/7 Kohtaroh Miura
(GSI Helmholts-Institute Mainz)
Lattice QCD Precision Science for Muon g-2 and Running alpha
6/29 Hiroshi Ohki
(Nara Women's university)
Progress on the nucleon EDM calculations in lattice QCD
6/22 So Chigusa
マグノン(スピン波)を用いた軽いボソン暗黒物質の直接探索 slide1
6/15 Dorin Weissman
The quantization of folded strings in non-critical dimensions
6/8 Tatsuo Kobayashi
(Hokkaido Univ.)
Modular flavor symmetry
6/1 Tomonori Ugajin
(YITP Kyoto)
Entanglement between two disjoint universes slide1
5/25 Teppei Kitahara
(Nagoya U)
Novel approach to neutron electric dipole moment search using weak measurement
5/18 Chang-Tse Hsieh
Anomaly of the Electromagnetic Duality of Maxwell Theory
5/11 Hidehiko Shimada
Bose-Einstein Condensation and large-N colour confinement
4/27 Shohei Okawa
(University of Victoria)
Lepton Portal Dark Matter: current status and muon g-2 explanation
4/20 Shuhei Iguro
(Nagoya Univ.)
Testing the 2HDM explanation of the muon g-2 anomaly at the LHC
2/21 Takahiro Nishinaka
(Ritsumeikan U)
Peculiar index relation for Argyres-Douglas theories slide1
1/15 Soichiro Hashiba
(Tokyo U., RESCEU)
Gravitational production of right-handed neutrino after quintessential inflation slide1
1/8 Shinji Hirano
(Wits University, South Africa)
Nearly AdS2 holography in quantum CGHS model
Date Speaker Title Slide/Video
12/18 Teruyuki Kitabayashi
(Tokai University)
Clockwork origin of neutrino mixings slide1
12/4 Shintaro Eijima
Probing leptogenesis in the nuMSM slide1
11/26 Yutaka Hosotani
(Osaka University)
CKM matrix and FCNC suppression in SO(5)×U(1)×SU(3) gauge-Higgs unification slide1
11/19 Takeshi Kobayashi
(KMI (Nagoya University))
To B or not to B: Primordial magnetic fields from Weyl anomaly and Beyond slide1
11/14 Ryo Yokokura
Topological order in the color-flavor locked phase of (3+1)-dimensional U(N) gauge-Higgs system slide1
11/5 Teppei Kitahara
Hunt for new physics in kaon decays and recent KOTO result
10/23 Seyed Morteza Hosseini
(Kavli IPMU)
A story of gravitational blocks and QFT indices
10/16 Kohei Kamada
(University of Tokyo, RESCEU)
Cosmological Magnetic Fields Meets Chiral Anomaly slide1
8/9 Keita Nii
(AEC, University of Bern)
Seiberg ``N-ality
7/19 Junichiro Kawamura
(Ohio State University)
Complete Vector-like Fourth Family and new U(1) for Muon Anomalies slide1
7/5 Yuho Sakatani
(Kyoto Pref U Med)
Type II DFT solutions from Poisson-Lie T-duality/plurality
7/2 Shinji Hirano
(University of the Witwatersrand, South Africa)
Information transfer and black hole evaporation via traversable BTZ wormholes
6/28 Toshifumi Noumi
(Kobe Univ.)
Primordial non-Gaussianities as a particle collider slide1
6/21 Keisuke Yanagi
(Univ. of Tokyo)
Dark Matter Heating vs. Rotochemical Heating in Old Neutron Stars slide1
6/14 Katsushi Ito
(Tokyo Institute of Technology)
TBA equations and resurgent Quantum Mechanics slide1
6/11 Ayuki Kamada
(IBS, Korea)
Composite asymmetric dark matter and galactic rotation curves slide1
6/7 Nobuhito Maru
(Osaka City University)
Lecture: Basics of Gauge-Higgs Unification slide1
6/7 Nobuhito Maru
(Osaka City University)
Dark Matter in Gauge-Higgs Unification slide1
6/4 Yoshihiro Shigekami
(Huazhong U of Science and Technology)
(g-2)_{mu} Versus Flavor Changing Neutral Current Induced by the Light (B-L)_{mu tau} Boson slide1
5/24 Ken Shiozaki
Fermionic partial transpose and non-local order parameters for SPT phases of fermions slide1
5/17 Keiko Nagao
(Okayama University of Science)
Dark matter mass and distribution by directional slide1
4/26 Koji Umemoto
Aspects of Holographic Entanglement of Purification Conjecture slide1
4/23 Michihisa Takeuchi
New Physics searches at the LHC and beyond