1.1k citations · 2.8k across the 83 of their papers we have counts for
77 papers · 1 filter
UV completion of 2D Ising CFT:a golden E_8 massless -matrix
Changrim Ahn, Minkyoo Kim
We present a full classification of UV complete QFTs that RG flow to the 2D Ising CFT by solving the bootstrap equations for massless right--left S-matrices. For the Ising model wi…
Spectrum of the Hypereclectic Spin Chain and Pólya Counting
Changrim Ahn, Matthias Staudacher
In earlier work we proposed a generating function that encodes the Jordan block spectrum of the integrable Hypereclectic spin chain, related to the one-loop dilatation operator of…
On the classification of UV completions of integrable deformations of CFT
Changrim Ahn, André LeClair
It is well understood that 2d conformal field theory (CFT) deformed by an irrelevant perturbation of dimension has universal properties. In particular, for the most…
Combinatorial Solution of the Eclectic Spin Chain
Changrim Ahn, Luke Corcoran, Matthias Staudacher
The one-loop dilatation operator in the holomorphic 3-scalar sector of the dynamical fishnet theory is studied. Due to the non-unitary nature of the underlying field theory this op…
The Integrable (Hyper)eclectic Spin Chain
Changrim Ahn, Matthias Staudacher
We refine the recently introduced notion of eclectic spin chains by including a maximal number of deformation parameters. These models are integrable, nearest-neighbor n-state spin…
Addendum: Nonlinear integral equations for the sausage model
Changrim Ahn, Janos Balog, Francesco Ravanini
We complete the derivation of the sausage model NLIE by giving a proof of the crucial relation (3.24) of the original paper based on the analytic properties of and .
Some semiclassical structure constants for AdS_4 x CP^3
Changrim Ahn, Plamen Bozhilov
We compute structure constants in three-point functions of three string states in AdS_4 x CP^3 in the framework of the semiclassical approach. We consider HHL correlation functions…
Giant magnon-like solution in Sch_5 x S^5
Changrim Ahn, Plamen Bozhilov
In this paper we have found a classical giant magnon-like solution with both infinite and finite angular momentum moving in Sch_5 x S^5 with B-field, which is believed to be dual t…
NLIE for the Sausage model
Changrim Ahn, Janos Balog, Francesco Ravanini
The sausage model, first proposed by Fateev, Onofri, and Zamolodchikov, is a deformation of the O(3) sigma model preserving integrability. The target space is deformed from the sph…
Finite-size effect of η-deformed AdS_5 x S^5 at strong coupling
Changrim Ahn
We compute Luscher corrections for a giant magnon in the η-deformed (AdS_5\times S^5)_η using the su(2|2)_q-invariant S-matrix at strong coupling and compare with the finite-size e…
A HHL 3-point correlation function in the η-deformed AdS_5 x S^5
Changrim Ahn, Plamen Bozhilov
We derive the 3-point correlation function between two giant magnons heavy string states and the light dilaton operator with zero momentum in the η-deformed AdS_5 x S^5 valid for a…
Finite-size giant magnons on η-deformed AdS_5 x S^5
Changrim Ahn, Plamen Bozhilov
We consider strings moving in the R_t x S^3_ηsubspace of the η-deformed AdS_5 x S^5 and obtain a class of solutions depending on several parameters. They are characterized by the s…
String solutions in AdS_3 x S^3 x T^4 with NS-NS B-field
Changrim Ahn, Plamen Bozhilov
We develop an approach for solving the string equations of motion and Virasoro constraints in any background which has some (unfixed) number of commuting Killing vector fields. It…
On the Renormalization Group Flow in Two Dimensional Superconformal Models
Changrim Ahn, Marian Stanishkov
We extend the results on the RG flow in the next to leading order to the case of the supersymmetric minimal models SM_p for p>> 1. We explain how to compute the NS and Ramond field…
Exact S-matrices for AdS_3/CFT_2
Changrim Ahn, Diego Bombardelli
We propose exact -matrices for the AdS_3/CFT_2 duality between Type IIB strings on AdS_3 x S^3 x M_4 with M_4=S^3 x S^1 or T^4 and the corresponding two-dimensional conformal fi…
Worldsheet S-matrix of beta-deformed SYM
Changrim Ahn, Minkyoo Kim, Bum-Hoon Lee
We compute perturbative worldsheet S-matrix of beta-deformed AdS/CFT in the strong and weak `t Hooft coupling limit to compare with exact S-matrix. For the purpose we take near BMN…
OPE in planar QCD from integrability
Changrim Ahn, Omar Foda, Rafael I. Nepomechie
We consider the operator product expansion of local single-trace operators composed of the self-dual components of the field strength tensor in planar QCD. Using the integrability…
Finite-size effects of beta-deformed AdS_5/CFT_4 at strong coupling
Changrim Ahn, Diego Bombardelli, Minkyoo Kim
We compute both classical and quantum finite-size corrections at leading order in the strong coupling limit for the (dyonic) giant magnon in the Lunin-Maldacena background. Based o…
TBA, NLO Luscher correction, and double wrapping in twisted AdS/CFT
Changrim Ahn, Zoltan Bajnok, Diego Bombardelli +1
The ground-state energy of integrably-twisted theories is analyzed in finite volume. We derive the leading and next-to-leading order (NLO) Lüscher-type corrections for large volume…
Three-point Correlation Function of Giant Magnons in the Lunin-Maldacena background
Changrim Ahn, Plamen Bozhilov
We compute semiclassical three-point correlation function, or structure constant, of two finite-size (dyonic) giant magnon string states and a light dilaton mode in the Lunin-Malda…
Finite-size Giant Magnons on AdS_4 x CP^3_γ
Changrim Ahn, Plamen Bozhilov
We investigate finite-size giant magnons propagating on γ-deformed AdS_4 x CP^3_γ type IIA string theory background, dual to one parameter deformation of the N=6 super Chern-Simoms…
Three-point Correlation functions of Giant magnons with finite size
Changrim Ahn, Plamen Bozhilov
We compute holographic three-point correlation functions or structure constants of a zero-momentum dilaton operator and two (dyonic) giant magnon string states with a finite-size l…
Review of AdS/CFT Integrability, Chapter III.2: Exact world-sheet S-matrix
Changrim Ahn, Rafael I. Nepomechie
We review the derivation of the S-matrix for planar N=4 supersymmetric Yang-Mills theory and type IIB superstring theory on an AdS5xS5 background. After deriving the S-matrix for t…
Review of AdS/CFT Integrability: An Overview
Niklas Beisert, Changrim Ahn, Luis F. Alday +23
This is the introductory chapter of a review collection on integrability in the context of the AdS/CFT correspondence. In the collection we present an overview of the achievements…