97 citations · 622 across the 25 of their papers we have counts for
25 papers
Time-Dependent Integrability from Gauge Theory, I
Shota Komatsu, Jun-ichi Sakamoto, Anders Wallberg +1
Solvable time-dependent systems provide important settings for studying non-equilibrium physics, where exact results are rare. They are also useful for benchmarking quantum simulat…
and root- deformations in four-dimensional Chern-Simons theory
Jun-ichi Sakamoto, Roberto Tateo, Masahito Yamazaki
The four-dimensional Chern-Simons (CS) theory provides a systematic procedure for realizing two-dimensional integrable field theories. It is therefore a natural question to ask whe…
Dualities and Discretizations of Integrable Quantum Field Theories from 4d Chern-Simons Theory
Meer Ashwinkumar, Jun-ichi Sakamoto, Masahito Yamazaki
We elucidate the relationship between 2d integrable field theories and 2d integrable lattice models, in the framework of the 4d Chern-Simons theory. The 2d integrable field theory…
Non-Abelian Toda field theories from a 4D Chern-Simons theory
Osamu Fukushima, Jun-ichi Sakamoto, Kentaroh Yoshida
We derive non-abelian Toda field theories (NATFTs) from a 4d Chern-Simons (CS) theory with two order defects by employing a certain asymptotic boundary condition. The 4d CS theory…
Integrable deformed sigma models from 4D Chern-Simons theory
Osamu Fukushima, Jun-ichi Sakamoto, Kentaroh Yoshida
Recently, a variety of deformed manifolds, with which 2D non-linear sigma models (NLSMs) are classically integrable, have been presented by Arutyunov, Bassi and Lacroix (…
The Faddeev-Reshetikhin model from a 4D Chern-Simons theory
Osamu Fukushima, Jun-ichi Sakamoto, Kentaroh Yoshida
We derive the Faddeev-Reshetikhin (FR) model from a four-dimensional Chern- Simons theory with two order surface defects by following the work by Costello and Yamazaki [arXiv:1908.…
Yang-Baxter deformations of the AdSS supercoset sigma model from 4D Chern-Simons theory
Osamu Fukushima, Jun-ichi Sakamoto, Kentaroh Yoshida
We present homogeneous Yang-Baxter deformations of the AdSS supercoset sigma model as boundary conditions of a 4D Chern-Simons theory. We first generalize the procedu…
Superconformal Block from Holographic Geometry
Heng-Yu Chen, Jun-ichi Sakamoto
We explicitly construct the holographic dual configuration for the four dimensional superconformal block containing half-BPS scalar primary operators by considering…
Comments on -deformed principal chiral model from 4D Chern-Simons theory
Osamu Fukushima, Jun-ichi Sakamoto, Kentaroh Yoshida
We study -deformations of principal chiral model (PCM) from the viewpoint of a 4D Chern-Simons (CS) theory. The -deformed PCM has originally been derived from the 4D CS theor…
Yang-Baxter deformations and generalized supergravity -- A short summary
Domenico Orlando, Susanne Reffert, Jun-ichi Sakamoto +2
Integrable deformations of type IIB superstring theory on have played an important role over the last years. The Yang-Baxter deformation is a systematic…
Gravitational perturbations as -deformations in 2D dilaton gravity systems
Takaaki Ishii, Suguru Okumura, Jun-ichi Sakamoto +1
We consider gravitational perturbations of 2D dilaton gravity systems and show that these can be recast into -deformations (at least) under certain conditions, where …
Integrable deformations of string sigma models and generalized supergravity
Jun-ichi Sakamoto
This thesis is mainly devoted to studying integrable deformations of the superstring and generalized supergravity. We start to give a brief review of…
Weyl invariance of string theories in generalized supergravity backgrounds
Jose J. Fernandez-Melgarejo, Jun-ichi Sakamoto, Yuho Sakatani +1
We revisit Weyl invariance of string theories in generalized supergravity backgrounds. In the previous work arXiv:1703.09213, a possible counterterm was constructed, but it seems t…
Local -deformations and Yang-Baxter sigma model
Jun-ichi Sakamoto, Yuho Sakatani
Homogeneous Yang-Baxter (YB) deformation of AdSS superstring is revisited. We calculate the YB sigma model action up to quadratic order in fermions and show that homo…
-folds from Yang-Baxter deformations
Jose J. Fernandez-Melgarejo, Jun-ichi Sakamoto, Yuho Sakatani +1
Yang-Baxter (YB) deformations of type IIB string theory have been well studied from the viewpoint of classical integrability. Most of the works, however, are focused upon the local…
in generalized supergravity
T. Araujo, E. Ó Colgáin, J. Sakamoto +2
We showed in previous work that for homogeneous Yang-Baxter (YB) deformations of AdSS, the open string metric and coupling, and as a result the closed string density…
Homogeneous Yang-Baxter deformations as generalized diffeomorphisms
Jun-ichi Sakamoto, Yuho Sakatani, Kentaroh Yoshida
Yang-Baxter (YB) deformations of string sigma model provide deformed target spaces. We propose that homogeneous YB deformations always lead to a certain class of -twisted backgr…
Conformal Twists, Yang-Baxter -models & Holographic Noncommutativity
Thiago Araujo, Ilya Bakhmatov, Eoin Ó Colgáin +3
Expanding upon earlier results [arXiv:1702.02861], we present a compendium of -models associated with integrable deformations of AdS generated by solutions to homogenous cla…
Weyl invariance for generalized supergravity backgrounds from the doubled formalism
Jun-ichi Sakamoto, Yuho Sakatani, Kentaroh Yoshida
It has recently been shown that a set of the generalized type IIB supergravity equations follows from the requirement of kappa symmetry of the type IIB Green-Schwarz superstring th…
Yang-Baxter -models, conformal twists, and noncommutative Yang-Mills theory
Thiago Araujo, Ilya Bakhmatov, Eoin Ó Colgáin +3
The Yang-Baxter -model is a systematic way to generate integrable deformations of AdSS. We recast the deformations as seen by open strings, where the metric is und…
Yang-Baxter deformations of and the associated T-dual models
Jun-ichi Sakamoto, Kentaroh Yoshida
Recently, for principal chiral models and symmetric coset sigma models, Hoare and Tseytlin proposed an interesting conjecture that the Yang-Baxter deformations with the homogeneous…
Generalized type IIB supergravity equations and non-Abelian classical r-matrices
Domenico Orlando, Susanne Reffert, Jun-ichi Sakamoto +1
We study Yang-Baxter deformations of the superstring with non-Abelian classical -matrices which satisfy the homogeneous classical Yang-Baxter equation (CYBE).…
Lax pairs for deformed Minkowski spacetimes
Hideki Kyono, Jun-ichi Sakamoto, Kentaroh Yoshida
We proceed to study Yang-Baxter deformations of 4D Minkowski spacetime based on a conformal embedding. We first revisit a Melvin background and argue a Lax pair by adopting a simpl…
Lax pairs on Yang-Baxter deformed backgrounds
Takashi Kameyama, Hideki Kyono, Jun-ichi Sakamoto +1
We explicitly derive Lax pairs for string theories on Yang-Baxter deformed backgrounds, 1) gravity duals for noncommutative gauge theories, 2) -deformations of S, 3) Schrödi…