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83 papers
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 .