96 citations · 385 across the 19 of their papers we have counts for
19 papers
Rethinking quantum information in gravity and fields
Kanato Goto, Yuta Hamada, Kohtaro Kato +6
This paper presents a curated selection of research questions at the intersection of quantum gravity and quantum information, chosen to highlight issues that we regard as particula…
Generalized Free Fields in de Sitter from 1D CFT
Kanato Goto, Alexey Milekhin, Herman Verlinde +1
We show that a pair of identical large 1D CFTs, like the low-energy limit of the SYK model or a line-defect inside a higher dimensional CFT, contains a natural sub-algebra of o…
Spatial deformation of many-body quantum chaotic systems and quantum information scrambling
Kanato Goto, Taozhi Guo, Tomoki Nosaka +3
We study the effect of spatial inhomogeneity on quantum information scrambling, a process of spreading and locally hiding quantum information in quantum many-body systems. As a par…
Scrambling and Recovery of Quantum Information in Inhomogeneous Quenches in Two-dimensional Conformal Field Theories
Kanato Goto, Masahiro Nozaki, Shinsei Ryu +2
We study various quantum quench processes induced by the Möbius/sine-square deformation of the Hamiltonian in two-dimensional conformal field theories starting from the thermofield…
Entanglement Dynamics of the Non-Unitary Holographic Channel
Kanato Goto, Masahiro Nozaki, Kotaro Tamaoka +1
We study the dynamical properties of a strongly scrambling quantum circuit involving a projective measurement on a finite-sized region by studying the operator entanglement entropy…
Chaos by Magic
Kanato Goto, Tomoki Nosaka, Masahiro Nozaki
There is a property of a quantum state called magic. It measures how difficult for a classical computer to simulate the state. In this paper, we study magic of states in the integr…
Non-Equilibrating a Black Hole with Inhomogeneous Quantum Quench
Kanato Goto, Masahiro Nozaki, Shinsei Ryu +2
We study quantum quench processes in (1+1)-dimensional conformal field theory (CFT) in which the initial thermal equilibrium (Gibbs) state is time-evolved by spatially inhomogeneou…
Information Scrambling Versus Quantum Revival Through the Lens of Operator Entanglement
Kanato Goto, Ali Mollabashi, Masahiro Nozaki +2
In this paper, we look for signatures of quantum revivals in two-dimensional conformal field theories (2d CFTs) on a spatially compact manifold by using operator entanglement. It i…
Factorizing Wormholes in a Partially Disorder-Averaged SYK Model
Kanato Goto, Kenta Suzuki, Tomonori Ugajin
In this paper, we introduce a "partially disorder-averaged" SYK model. This model has a real parameter that smoothly interpolates between the ordinary totally disorder-averaged SYK…
Subregion Spectrum Form Factor via Pseudo Entropy
Kanato Goto, Masahiro Nozaki, Kotaro Tamaoka
We introduce a subsystem generalization of the spectral form factor via pseudo entropy, the von-Neumann entropy for the reduced transition matrix. We consider a transition matrix b…
Product of Random States and Spatial (Half-)Wormholes
Kanato Goto, Yuya Kusuki, Kotaro Tamaoka +1
We study how coarse-graining procedure of an underlying UV-complete quantum gravity gives rise to a connected geometry. It has been shown, quantum entanglement plays a key role in…
Replica wormholes for an evaporating 2D black hole
Kanato Goto, Thomas Hartman, Amirhossein Tajdini
Quantum extremal islands reproduce the unitary Page curve of an evaporating black hole. This has been derived by including replica wormholes in the gravitational path integral, but…
Janus interface entropy and Calabi's diastasis in four-dimensional superconformal field theories
Kanato Goto, Lento Nagano, Tatsuma Nishioka +1
We study the entropy associated with the Janus interface in a 4 superconformal field theory. With the entropy defined as the interface contribution to an entangl…
Holographic Complexity Equals Which Action?
Kanato Goto, Hugo Marrochio, Robert C. Myers +2
We revisit the complexityaction proposal for charged black holes. We investigate the complexity for a dyonic black hole, and we find the surprising feature that the late-time gr…
Janus interface in two-dimensional supersymmetric gauge theories
Kanato Goto, Takuya Okuda
We study the Janus interface, a domain wall characterized by spatially varying couplings, in two-dimensional N=(2,2) supersymmetric gauge theories on the two-sphere. When the varia…
Interface entropy in four dimensions as Calabi's diastasis on the conformal manifold
Kanato Goto, Takuya Okuda
We conjecture an equality between (1) the entropy associated with a Janus interface in a 4d N=2 superconformal field theory and (2) Calabi's diastasis, a particular combination of…
On the observer dependence of the Hilbert space near the horizon of black holes
Kanato Goto, Yoichi Kazama
One of the pronounced characteristics of gravity, distinct from other interactions, is that there are no local observables which are independent of the choice of the spacetime coor…
CFT descriptions of bulk local states in the AdS black holes
Kanato Goto, Tadashi Takayanagi
We present a new method for reconstructing CFT duals of states excited by the bulk local operators in the three dimensional AdS black holes in the AdS/CFT context. As an important…
Causal Evolutions of Bulk Local Excitations from CFT
Kanato Goto, Masamichi Miyaji, Tadashi Takayanagi
Bulk localized excited states in an AdS spacetime can be constructed from Ishibashi states with respect to the global conformal symmetry in the dual CFT. We study boundary two poin…