266 citations · 1k across the 35 of their papers we have counts for
36 papers
Dyonic edge modes in Abelian gauge theory
Keito Shimizu, Sotaro Sugishita
We find new boundary conditions in four-dimensional Abelian gauge theory with general Chern--Simons boundary couplings. The boundary conditions allow dyonic edge modes and physical…
Revisiting boundary electromagnetic duality and edge modes
Keito Shimizu, Sotaro Sugishita
We revisit electric and magnetic surface charges and edge modes in four-dimensional Maxwell theory and QED on a spacetime with a finite spatial boundary. Using the S-wall, which im…
Bridging dS/CFT and Celestial Holography via Ward-Takahashi Identities
Hideo Furugori, Naoki Ogawa, Sotaro Sugishita +1
In 2507.17558, we provide a map from a scalar theory on -dimensional Minkowski spacetime to a scalar theory with a continuous mass spectrum on -dimensional de Sitter…
Celestial Holography meets dS/CFT
Hideo Furugori, Naoki Ogawa, Sotaro Sugishita +1
We provide a concrete link between celestial amplitudes and cosmological correlators. We first construct a map from quantum field theories (QFTs) in -dimensional Euclidean s…
Notes on Rindler wave packets in Minkowski spacetime
Shono Shibuya, Sotaro Sugishita
We consider wave packets of a massless scalar field that have well-localized Rindler energy, and examine how their energy appears to a Minkowski observer to study how the classical…
Asymptotic symmetry and confinement in three-dimensional QED
Keito Shimizu, Sotaro Sugishita
We investigate the asymptotic symmetries of quantum electrodynamics (QED) in three dimensions, demonstrating that their actions on asymptotic states are trivial under the assumptio…
Heat and work in black hole thermodynamics via holography
Tomohiro Shigemura, Keito Shimizu, Sotaro Sugishita +2
We propose a formulation of black hole thermodynamics that incorporates the notions of heat and work, based on the thermodynamics in quantum theory and the AdS/CFT correspondence.…
Bulk Reconstruction and Gauge Invariance
Sotaro Sugishita, Seiji Terashima
In this paper, we discuss the concept of bulk reconstruction, which involves mapping bulk operators into CFT operators to understand the emergence of spacetime and gravity. We argu…
Celestial two-point functions and rectified dictionary
Hideo Furugori, Naoki Ogawa, Sotaro Sugishita +1
A naive celestial dictionary causes massless two-point functions to take the delta-function forms in the celestial conformal field theory (CCFT). We rectify the dictionary, involvi…
Subregion Complementarity in AdS/CFT
Sotaro Sugishita, Seiji Terashima
We examine the bulk reconstruction in the AdS/CFT correspondence. We demonstrate that the subregion duality fails to hold, highlighting discrepancies between operators in causal we…
Dress code for infrared safe scattering in QED
Hayato Hirai, Sotaro Sugishita
We study the -matrix and inclusive cross-section for general dressed states in quantum electrodynamics. We obtain an infrared factorization formula of the -matrix elements fo…
Spectrum of quantum KdV hierarchy in the semiclassical limit
Anatoly Dymarsky, Ashish Kakkar, Kirill Pavlenko +1
We employ semiclassical quantization to calculate spectrum of quantum KdV charges in the limit of large central charge . Classically, KdV charges generate completely…
Rindler Bulk Reconstruction and Subregion Duality in AdS/CFT
Sotaro Sugishita, Seiji Terashima
In this paper, we study the AdS-Rindler reconstruction. The CFT operators naively given by the holographic dictionary for the AdS-Rindler reconstruction contain tachyonic modes, wh…
Target space entanglement in quantum mechanics of fermions at finite temperature
Temma Hanyuda, Soichiro Mori, Sotaro Sugishita
We consider the target space entanglement in quantum mechanics of non-interacting fermions at finite temperature. Unlike pure states investigated in arXiv:2105.13726, the (Rényi) e…
Target Space Entanglement in Quantum Mechanics of Fermions and Matrices
Sotaro Sugishita
Quantum entanglement is closely related to the structure of spacetime in quantum gravity. For quantum field theories or statistical models, we usually consider base space entanglem…
Target space entanglement in quantum mechanics of fermions and matrices
Sotaro Sugishita
We consider entanglement of first-quantized identical particles by adopting an algebraic approach. In particular, we investigate fermions whose wave functions are given by the Slat…
IR finite S-matrix by gauge invariant dressed states
Hayato Hirai, Sotaro Sugishita
Dressed states were proposed to define the infrared (IR) finite -matrix in QED or gravity. We show that the original Kulish-Faddeev dressed states are not enough to cure the IR…
KdV-charged black holes
Anatoly Dymarsky, Sotaro Sugishita
We construct black hole geometries in AdS with non-trivial values of KdV charges. The black holes are holographically dual to quantum KdV Generalized Gibbs Ensemble in 2d CFT.…
Dressed states from gauge invariance
Hayato Hirai, Sotaro Sugishita
The dressed state formalism enables us to define the infrared finite -matrix for QED. In the formalism, asymptotic charged states are dressed by clouds of photons. The dressed a…
Deep Learning and Holographic QCD
Koji Hashimoto, Sotaro Sugishita, Akinori Tanaka +1
We apply the relation between deep learning (DL) and the AdS/CFT correspondence to a holographic model of QCD. Using a lattice QCD data of the chiral condensate at a finite tempera…
Conservation Laws from Asymptotic Symmetry and Subleading Charges in QED
Hayato Hirai, Sotaro Sugishita
We present several results on memory effects, asymptotic symmetry and soft theorems in massive QED. We first clarify in what sense the memory effects are interpreted as the charge…
Thoughts on Holographic Complexity and its Basis-dependence
Koji Hashimoto, Norihiro Iizuka, Sotaro Sugishita
In this paper, we argue that holographic complexity should be a basis-dependent quantity. Computational complexity of a state is defined as a minimum number of gates required to ob…
Notes on the gravitational, electromagnetic and axion memory effects
Yuta Hamada, Sotaro Sugishita
We investigate the memory effects associated with the kicks of particles. Recently, the equivalence between the memory effect and soft theorem has been established. By computing th…
Deep Learning and AdS/CFT
Koji Hashimoto, Sotaro Sugishita, Akinori Tanaka +1
We present a deep neural network representation of the AdS/CFT correspondence, and demonstrate the emergence of the bulk metric function via the learning process for given data set…