233 citations · 1.8k across the 38 of their papers we have counts for
27 papers · 1 filter
Effective Field Theory of Noncritical M-theory from Bosonization
Patrick Jefferson, Tokiro Numasawa
We extend the coadjoint orbit approach to bosonization systematized by Delacretaz-Du-Mehta-Son to double-scaled non-relativistic Fermi liquids with central inverted harmonic oscill…
Gauging spacetime inversions in quantum gravity
Daniel Harlow, Tokiro Numasawa
Spacetime inversion symmetries such as parity and time reversal play a central role in physics, but they are usually treated as global symmetries. In quantum gravity there are no g…
Bridging two quantum quench problems -- local joining quantum quench and Möbius quench -- and their holographic dual descriptions
Jonah Kudler-Flam, Masahiro Nozaki, Tokiro Numasawa +2
We establish an equivalence between two different quantum quench problems, the joining local quantum quench and the Möbius quench, in the context of -dimensional conformal f…
On SYK traversable wormhole with imperfectly correlated disorders
Tomoki Nosaka, Tokiro Numasawa
In this paper we study the phase structure of two Sachdev-Ye-Kitaev models (L-system and R-system) coupled by a simple interaction, with imperfectly correlated disorder. When the d…
Liouville Theory and the Weil-Petersson Geometry of Moduli Space
Sarah M. Harrison, Alexander Maloney, Tokiro Numasawa
Liouville theory describes the dynamics of surfaces with constant negative curvature and can be used to study the Weil-Petersson geometry of the moduli space of Riemann surfaces. T…
Universal Dynamics of Heavy Operators in Boundary CFT
Tokiro Numasawa, Ioannis Tsiares
We derive a universal asymptotic formula for generic boundary conditions for the average value of the bulk-to-boundary and boundary Operator Product Expansion coefficients of any u…
Four coupled SYK models and Nearly AdS gravities: Phase Transitions in Traversable wormholes and in Bra-ket wormholes
Tokiro Numasawa
We study four coupled SYK models and nearly AdS gravities. In the SYK model side, we construct a model that couples two copies of two coupled SYK models. In nearly AdS grav…
Chaos exponents of SYK traversable wormholes
Tomoki Nosaka, Tokiro Numasawa
In this paper we study the chaos exponent, the exponential growth rate of the out-of-time-ordered four point functions, in a two coupled SYK models which exhibits a first order pha…
Quantum Chaos, Thermodynamics and Black Hole Microstates in the mass deformed SYK model
Tomoki Nosaka, Tokiro Numasawa
We study various aspects of the mass deformed SYK model which can escape the interiors of pure boundary state black holes. SYK boundary states are given by a simple local boundary…
Double Local Quenches in 2D CFTs and Gravitational Force
Pawel Caputa, Tokiro Numasawa, Teppei Shimaji +2
In this work we extensively study the dynamics of excited states created by instantaneous local quenches at two different points, i.e., double local quenches. We focus on setups in…
Late Time Quantum Chaos of pure states in the SYK model
Tokiro Numasawa
In this letter, we study the return amplitude, which is the overlap between the initial state and the time evolved state, in the Sachdev-Ye-Kitaev (SYK) model. Initial states are t…
Global Spacetime Structure of Compactified Inflationary Universe
Tokiro Numasawa, Daisuke Yoshida
We investigate the global spacetime structure of torus de Sitter universe, which is exact de Sitter space with torus identification based on the flat chart. We show that past incom…
Holographic Complexity for disentangled states
Tokiro Numasawa
In this paper we consider the maximal volume and the action, which are conjectured to be gravity duals of the complexity, in the black hole geometries with end of the world branes.…
Mixed global anomalies and boundary conformal field theories
Tokiro Numasawa, Satoshi Yamaguchi
We consider the relation of mixed global gauge gravitational anomalies and boundary conformal field theory in WZW models for simple Lie groups. The discrete symmetries of considera…
Scattering effect on entanglement propagation in RCFTs
Tokiro Numasawa
In this paper we discuss the scattering effect on entanglement propagation in RCFTs. In our setup, we consider the time evolution of excited states created by the insertion of many…
EPR Pairs, Local Projections and Quantum Teleportation in Holography
Tokiro Numasawa, Noburo Shiba, Tadashi Takayanagi +1
In this paper we analyze three quantum operations in two dimensional conformal field theories (CFTs): local projection measurements, creations of partial entanglement between two C…
Scrambling without chaos in RCFT
Pawel Caputa, Tokiro Numasawa, Alvaro Veliz-Osorio
In this paper we investigate measures of chaos and entanglement in rational conformal field theories in 1+1 dimensions. First, we derive a universal formula for the late time value…
Charged Entanglement Entropy of Local Operators
Pawel Caputa, Masahiro Nozaki, Tokiro Numasawa
In this work we consider the time evolution of charged Renyi entanglement entropies after exciting the vacuum with local fermionic operators. In order to explore the information co…
Gravity Dual of Quantum Information Metric
Masamichi Miyaji, Tokiro Numasawa, Noburo Shiba +2
We study a quantum information metric (or fidelity susceptibility) in conformal field theories with respect to a small perturbation by a primary operator. We argue that its gravity…
Quantum Entanglement of Fermionic Local Operators
Masahiro Nozaki, Tokiro Numasawa, Shunji Matsuura
In this paper we study the time evolution of (Renyi) entanglement entropies for locally excited states in four dimensional free massless fermionic field theory. Locally excited sta…
cMERA as Surface/State Correspondence in AdS/CFT
Masamichi Miyaji, Tokiro Numasawa, Noburo Shiba +2
We present how the surface/state correspondence, conjectured in arXiv:1503.03542, works in the setup of AdS3/CFT2 by generalizing the formulation of cMERA. The boundary states in c…
On the definition of entanglement entropy in lattice gauge theories
Sinya Aoki, Takumi Iritani, Masahiro Nozaki +3
We focus on the issue of proper definition of entanglement entropy in lattice gauge theories, and examine a naive definition where gauge invariant states are viewed as elements of…
Notes on Entanglement Entropy in String Theory
Song He, Tokiro Numasawa, Tadashi Takayanagi +1
In this paper, we study the entanglement entropy in string theory in the simplest setup of dividing the nine dimensional space into two halves. This corresponds to the leading quan…
Quantum Dimension as Entanglement Entropy in 2D CFTs
Song He, Tokiro Numasawa, Tadashi Takayanagi +1
We study entanglement entropy of excited states in two dimensional conformal field theories (CFTs). Especially we consider excited states obtained by acting primary operators on a…