177 citations · 1.6k across the 48 of their papers we have counts for
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Supersymmetric conformal field theories from quantum stabilizer codes
Kohki Kawabata, Tatsuma Nishioka, Takuya Okuda
We construct fermionic conformal field theories (CFTs) whose spectra are characterized by quantum stabilizer codes. We exploit our construction to search for fermionic CFTs with su…
Narain CFTs from quantum codes and their gauging
Kohki Kawabata, Tatsuma Nishioka, Takuya Okuda
We investigate the gauging of a symmetry in Narain conformal field theories (CFTs) constructed from qudit stabilizer codes. Considering both orbifold and fermionizat…
Narain CFTs from nonbinary stabilizer codes
Yasin Ferdous Alam, Kohki Kawabata, Tatsuma Nishioka +2
We generalize the construction of Narain conformal field theories (CFTs) from qudit stabilizer codes to the construction from quantum stabilizer codes over the finite field of prim…
Narain CFTs from qudit stabilizer codes
Kohki Kawabata, Tatsuma Nishioka, Takuya Okuda
We construct a discrete subset of Narain CFTs from quantum stabilizer codes with qudit (including qubit) systems whose dimension is a prime number. Our construction exploits three…
ABCD of 't Hooft operators
Hirotaka Hayashi, Takuya Okuda, Yutaka Yoshida
We compute by supersymmetric localization the expectation values of half-BPS 't Hooft line operators in , and gauge theories on $S^1 \times \…
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…
U(1) spin Chern-Simons theory and Arf invariants in two dimensions
Takuya Okuda, Koichi Saito, Shuichi Yokoyama
The level-k U(1) Chern-Simons theory is a spin topological quantum field theory for k odd. Its dynamics is captured by the 2d CFT of a compact boson with a certain radius. Recently…
SUSY localization for Coulomb branch operators in omega-deformed 3d N=4 gauge theories
Takuya Okuda, Yutaka Yoshida
We perform SUSY localization for Coulomb branch operators of 3d gauge theories in with -deformation. For the dressed monopole operators whose expe…
Wall-crossing and operator ordering for 't Hooft operators in N=2 gauge theories
Hirotaka Hayashi, Takuya Okuda, Yutaka Yoshida
We study half-BPS 't Hooft line operators in 4d gauge theories on with an -deformation. The recently proposed brane construction…
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…
Supersymmetric vortex defects in two dimensions
Kazuo Hosomichi, Sungjay Lee, Takuya Okuda
We study codimension-two BPS defects in 2d N=(2,2) supersymmetric gauge theories, focusing especially on those characterized by vortex-like singularities in the dynamical or non-dy…
Comments on supersymmetric renormalization in two-dimensional curved spacetime
Takuya Okuda
In this technical note we introduce a manifestly gauge-invariant and supersymmetric procedure to regularize and renormalize one-loop divergences of chiral multiplets in two-dimensi…
Mirror symmetry and the flavor vortex operator in two dimensions
Takuya Okuda
The flavor vortex operator is a local disorder operator defined by coupling a two-dimensional chiral multiplet to a non-dynamical gauge field with vortex…
Line operators in supersymmetric gauge theories and the 2d-4d relation
Takuya Okuda
This is the sixth article in the collection of reviews "Exact results on N=2 supersymmetric gauge theories", ed. J.Teschner. It is discussed how to use localisation techniques for…
Exact results for boundaries and domain walls in 2d supersymmetric theories
Daigo Honda, Takuya Okuda
We apply supersymmetric localization to N=(2,2) gauged linear sigma models on a hemisphere, with boundary conditions, i.e., D-branes, preserving B-type supersymmetries. We explain…
Scheme dependence of instanton counting in ALE spaces
Yuto Ito, Kazunobu Maruyoshi, Takuya Okuda
There have been two distinct schemes studied in the literature for instanton counting in A_{p-1} asymptotically locally Euclidean (ALE) spaces. We point out that the two schemes---…
Exact results for vortex loop operators in 3d supersymmetric theories
Nadav Drukker, Takuya Okuda, Filippo Passerini
Three dimensional field theories admit disorder line operators, dubbed vortex loop operators. They are defined by the path integral in the presence of prescribed singularities alon…
Line operators on S^1xR^3 and quantization of the Hitchin moduli space
Yuto Ito, Takuya Okuda, Masato Taki
We perform an exact localization calculation for the expectation values of Wilson-'t Hooft line operators in N=2 gauge theories on S^1xR^3. The expectation values are naturally exp…
Exact Results for 't Hooft Loops in Gauge Theories on S^4
Jaume Gomis, Takuya Okuda, Vasily Pestun
The path integral of a general N=2 supersymmetric gauge theory on S^4 is exactly evaluated in the presence of a supersymmetric 't Hooft loop operator. The result we find - obtained…
On the instantons and the hypermultiplet mass of N=2* super Yang-Mills on S^4
Takuya Okuda, Vasily Pestun
We show that the physical N=4 super Yang-Mills theory on a four-sphere with an arbitrary gauge group receives no instanton contributions, by clarifying the relation between the hyp…
String scattering in flat space and a scaling limit of Yang-Mills correlators
Takuya Okuda, Joao Penedones
We use the flat space limit of the AdS/CFT correspondence to derive a simple relation between the 2 to 2 scattering amplitude of massless string states in type IIB superstring theo…
Gauge Theory Loop Operators and Liouville Theory
Nadav Drukker, Jaume Gomis, Takuya Okuda +1
We propose a correspondence between loop operators in a family of four dimensional N=2 gauge theories on S^4 -- including Wilson, 't Hooft and dyonic operators -- and Liouville the…
Loop operators and S-duality from curves on Riemann surfaces
Nadav Drukker, David R. Morrison, Takuya Okuda
We study Wilson-'t Hooft loop operators in a class of N=2 superconformal field theories recently introduced by Gaiotto. In the case that the gauge group is a product of SU(2) group…