Shuichi Yokoyama

J-GLOBAL         Last updated: Oct 30, 2018 at 17:25
Shuichi Yokoyama
Kyoto University
Yukawa Institute for Theoretical Physics

Research Areas


Academic & Professional Experience

Apr 2011
Sep 2011
Seoul National University, Korea, Research fellow

Published Papers

Yokoyama Shuichi
Progress of Theoretical and Experimental Physics   2018(4) 043B02   2018   [Refereed]
Nosaka Tomoki, Yokoyama Shuichi
Journal of High Energy Physics   2018(6) 28   2018   [Refereed]
Aoki Sinya, Balog Janos, Yokoyama Shuichi
arXiv preprint arXiv:1804.04636      2018
Aoki Sinya, Yokoyama Shuichi
Progress of Theoretical and Experimental Physics   2018(3) 031B01   2018   [Refereed]
Nosaka Tomoki, Yokoyama Shuichi
Journal of High Energy Physics   2018(1) 1   2018   [Refereed]


Tomoki Nosaka, Shuichi Yokoyama
   Apr 2018
We perform a first step analysis toward generalization of the classification
of N=4 linear quiver gauge theories by Gaiotto and Witten including
Chern-Simons interaction. For this we investigate minimal N=4 U(N_1)_k x
U(N_2)_{-k} Chern-Simons theo...
Sinya Aoki, Shuichi Yokoyama
   Sep 2017
We construct an anti-de-Sitter (AdS) geometry from a conformal field theory
(CFT) defined on a general conformally flat manifold via a flow equation
associated with the curved manifold, which we refer to as the primary flow
equation. We explicitly...
Tomoki Nosaka, Shuichi Yokoyama
JHEP01(2018)001      Jun 2017
We investigate an N=4 U(N)_k x U(N+M)_{-k} Chern-Simons theory coupled to one
bifundamental hypermultiplet by employing its partition function, which is
given by 2N+M dimensional integration via localization. Surprisingly, by
performing the integr...
Shuichi Yokoyama
   Oct 2016
A class of matrix models which arises as partition function in U(N)
Chern-Simons matter theories on three sphere is investigated. Employing the
standard technique of the 1/N expansion we solve the system beyond the planar
limit. In particular we s...
Karthik Inbasekar, Sachin Jain, Subhajit Mazumdar, Shiraz Minwalla, V. Umesh, Shuichi Yokoyama
JHEP 1510 (2015) 176      May 2015   [Refereed]
We study the most general renormalizable Tex Tex Chern-Simons
gauge theory coupled to a single (generically massive) fundamental matter
multiplet. At leading order in the 't Hooft large Tex limit we present
computations and conjectures...
Shuichi Yokoyama
   Apr 2016
We present exact large N calculus of four point function in general
Chern-Simons bosonic and fermionic vector models. Applying the LSZ formula to
the four point function we determine two body scattering amplitudes in these
theories taking a specia...
Yosuke Imamura, Shuichi Yokoyama
J.Phys. A49 (2016) no.43, 435401      Mar 2016
We analyze the superconformal index of the N=3 supersymmetric Z_k generalized
orientifold theories recently proposed. In the large N limit we derive the
index from the Kaluza-Klein modes in AdS_5 x S^5/Z_k, which are obtained from
ones in AdS_5 x ...
Sachin Jain, Mangesh Mandlik, Shiraz Minwalla, Tomohisa Takimi, Spenta R. Wadia, Shuichi Yokoyama
JHEP 1504 (2015) 129      Apr 2014   [Refereed]
We present explicit computations and conjectures for Tex scattering
matrices in large Tex {\it Tex} Chern-Simons theories coupled to fundamental
bosonic or fermionic matter to all orders in the 't Hooft coupling expansion.
The bosonic and...
Shiraz Minwalla, Shuichi Yokoyama
JHEP 1602 (2016) 103      Jul 2015   [Refereed]
It has previously been conjectured that the theory of free fundamental
scalars minimally coupled to a Chern Simons gauge field is dual to the theory
of critical fundamental fermions minimally coupled to a level rank dual Chern
Simons gauge field. ...
Yosuke Imamura, Shuichi Yokoyama
   Mar 2016
We analyze the superconformal index of the N=3 supersymmetric Z_k generalized
orientifold theories recently proposed. In the large N limit we derive the
index from the Kaluza-Klein modes in AdS_5 x S^5/Z_k, which are obtained from
ones in AdS_5 x ...
Sachin Jain, Shiraz Minwalla, Shuichi Yokoyama
JHEP 1311 (2013) 037      May 2013   [Refereed]
We compute the thermal free energy for all renormalizable Chern Simon
theories coupled to a single fundamental bosonic and fermionic field in the 't
Hooft large N limit. We use our results to conjecture a strong weak coupling
duality invariance fo...
Shuichi Yokoyama
JHEP 1509 (2015) 211      Jun 2015   [Refereed]
We compute supersymmetry algebra (superalgebra) in supersymmetric Yang-Mills
theories (SYM) consisting of a vector multiplet including fermionic
contribution in six dimensions. We show that the contribution of fermion is
given by boundary terms. F...
Sachin Jain, Shiraz Minwalla, Tarun Sharma, Tomohisa Takimi, Spenta R. Wadia, Shuichi Yokoyama
JHEP 1309 (2013) 009      Jan 2013   [Refereed]
We study the thermal partition function of level Tex U(N) Chern-Simons
theories on Tex interacting with matter in the fundamental representation. We
work in the 't Hooft limit, Tex, with Tex and Tex held ...
Shuichi Yokoyama
JHEP 1412 (2014) 163      Jun 2014   [Refereed]
We perform a systematic analysis on supersymmetric states in N=4
supersymmetric Yang-Mills theory (SYM) on R x S^3. We find a new set of 1/16
BPS equations and determine the precise configuration of the supersymmetric
states by solving all 1/16 BP...
Sachin Jain, Sandip P. Trivedi, Spenta R. Wadia, Shuichi Yokoyama
JHEP 1210:194,2012      Jul 2012   [Refereed]
In this paper we discuss SU(N) Chern-Simons theories at level k with both
fermionic and bosonic vector matter. In particular we present an exact
calculation of the free energy of the N=2 supersymmetric model (with one chiral
field) for all values ...
Shuichi Yokoyama
JHEP01(2014)148      Oct 2013   [Refereed]
We compute the exact effective action for \cN=3 U(N)_k and \cN=4,6
U(N)_k\times U(N')_{-k} Chern-Simons theories with minimal matter content in
the 't Hooft vector model limit under which N and k go to infinity holding N/k,
N' fixed. We also exten...
Bobby Ezhuthachan, Shinji Shimasaki, Shuichi Yokoyama
JHEP 1112 (2011) 048      Jul 2011   [Refereed]
We investigate BPS solutions in ABJM theory on RxS^2. We find new BPS
solutions, which have nonzero angular momentum as well as nontrivial
configurations of fluxes. Applying the "Higgsing procedure" of arxiv:0803.3218
around a 1/2-BPS solution of ...
Yosuke Imamura, Daisuke Yokoyama, Shuichi Yokoyama
JHEP 1108:011,2011      Feb 2011   [Refereed]
We investigate the N=2 superconformal index for supersymmetric quiver
Chern-Simons theories with large N gauge groups. After general arguments about
the large N limit, we compute the first few terms in the series expansion of
the index for theorie...
Shuichi Yokoyama
JHEP 1301:052,2013      Oct 2012   [Refereed]
We study SU(N) level k Chern-Simons theories coupling to a fundamental
fermion with chemical potential for U(1) flavor symmetry. We solve this system
exactly in the 't Hooft limit, N,k\to\infty with \lambda = N/k fixed. The
solution exists up to |...
Shuichi Yokoyama
J.Phys.Conf.Ser. 343 (2012) 012134      Oct 2011   [Refereed]
We review aspects of superconformal indices in three dimension. Three
dimensional superconformal indices can be exactly computed by using
localization method including monopole contribution, and can be applied to
provide evidences for mirror duali...
Yosuke Imamura, Shuichi Yokoyama
Prog.Theor.Phys.121:915-940,2009      Dec 2008   [Refereed]
We investigate a class of N=4 quiver Chern-Simons theories and their gravity
duals. We define the group of fractional D3-brane charges in a type IIB brane
setup with taking account of D3-brane creation due to Hanany-Witten effect, and
confirm that...
Yosuke Imamura, Shuichi Yokoyama
JHEP 1104 (2011) 007      Jan 2011   [Refereed]
We derive a general formula of an index for three dimensional N=2
superconformal field theories with general R-charge assignments to chiral
multiplets by using the localization method in S^2xS^1 background. As examples
we compute the index for the...
Yosuke Imamura, Shuichi Yokoyama
JHEP 1011:059,2010; Erratum-ibid.1104:068,2011      Aug 2010   [Refereed]
We study Kaluza-Klein modes of a d=7, N=2 vector multiplet in AdS_4 x S^3.
Such modes arise in the context of AdS/CFT as dual objects of a class of gauge
invariant operators in N=4 Chern-Simons theories. We confirm that the
Kaluza-Klein modes prec...
Yosuke Imamura, Shuichi Yokoyama
Nucl.Phys.B827:183-216,2010      Aug 2009   [Refereed]
We compute a certain index for an N=4 Chern-Simons theory with gauge group
U(N)^r in the large N limit with taking account of monopole contribution, and
compare it to the corresponding multi-particle index for M-theory in the dual
geometry AdS_4 x...

Conference Activities & Talks

Aspects of minimal N=4 Chern-Simons theories
Shuichi Yokoyama
Non-perturbative Non-Perturbative Effects in Supersymmetric Field Theories   25 Oct 2018   
Flow equation, conformal symmetry, AdS geometries
Shuichi Yokoyama
Holography, Quantum Entanglement and Higher Spin Gravity II   Mar 2018   
Flow equation, conformal symmetry, AdS geometries
Shuichi Yokoyama
East Asia Joint Workshop on Fields and Strings 2017   Nov 2017   
Complete factorization in minimal N=4 Chern-Simons-matter theory
Shuichi Yokoyama
Strings and Fields 2017   Aug 2017   
Superconformal index of N = 3 orientifold theories
Shuichi Yokoyama
XXIX Workshop Beyond the Standard Model   Mar 2017   
Chern-Simons vector models and duality in three dimensions
Shuichi Yokoyama
Field Theory and String Theory,   Aug 2013   
Thermal Free Energy in Chern-Simons Vector models. [Invited]
Shuichi Yokoyama
India String Meeting   Dec 2012   
Supersymmetric Chern-Simons Theories with vector matter. [Invited]
Shuichi Yokoyama
Discussion Meeting   Sep 2012   
Chern-Simons Theories with Vector Matter. [Invited]
Shuichi Yokoyama
Mathematics and Applications of Branes in String and M-theory   Feb 2012   
Index for Three Dimensional Superconformal Field Theories and Its Applications.
Shuichi Yokoyama
International Conference Quantum Theory and Symmetries (QTS-7)   Aug 2011   
Supersymmetry Algebra in Super Yang-Mills Theories
Shuichi Yokoyama
School on Strings and Fields   Mar 2016   

Association Memberships