59 citations · 342 across the 19 of their papers we have counts for
18 papers · 1 filter
Learning S-Matrix Phases with Neural Operators
V. Niarchos, C. Papageorgakis
We use Fourier Neural Operators (FNOs) to study the relation between the modulus and phase of amplitudes in elastic scattering at fixed energies. Unlike previous approache…
Covariantly Constant Anomalies on Conformal Manifolds
Enrico Andriolo, Vasilis Niarchos, Constantinos Papageorgakis +1
Operators with integer scaling dimensions in even-dimensional conformal field theories exhibit well-known type-B Weyl anomalies. In general, these anomalies depend non-trivially on…
6D (2,0) Bootstrap with soft-Actor-Critic
Gergely Kántor, Vasilis Niarchos, Constantinos Papageorgakis +1
We study numerically the 6D (2,0) superconformal bootstrap using the soft-Actor-Critic (SAC) algorithm as a stochastic optimizer. We focus on the four-point functions of scalar sup…
Solving Conformal Field Theories with Artificial Intelligence
Gergely Kántor, Vasilis Niarchos, Constantinos Papageorgakis
In this paper we deploy for the first time Reinforcement-Learning algorithms in the context of the conformal-bootstrap programme to obtain numerical solutions of conformal field th…
Conformal Bootstrap with Reinforcement Learning
Gergely Kántor, Vasilis Niarchos, Constantinos Papageorgakis
We introduce the use of reinforcement-learning (RL) techniques to the conformal-bootstrap programme. We demonstrate that suitable soft Actor-Critic RL algorithms can perform effici…
Macdonald Indices for Four-dimensional Theories
Prarit Agarwal, Enrico Andriolo, Gergely Kántor +1
We brute-force evaluate the vacuum character for vertex operator algebras labelled by crystallographic complex reflection groups , , a…
(Mis-)Matching Type-B Anomalies on the Higgs Branch
Vasilis Niarchos, Constantinos Papageorgakis, Alessandro Pini +1
Building on arXiv:1911.05827, we uncover new properties of type-B conformal anomalies for Coulomb-branch operators in continuous families of 4D SCFTs. We study a la…
Accelerating Solitons
Ilarion V. Melnikov, Constantinos Papageorgakis, Andrew B. Royston
We present the saddle-point approximation for the effective Hamiltonian of the quantum kink in two-dimensional linear sigma models to all orders in the time-derivative expansion. W…
Type-B Anomaly Matching and the 6D (2,0) Theory
Vasilis Niarchos, Constantinos Papageorgakis, Elli Pomoni
We study type-B conformal anomalies associated with -BPS Coulomb-branch operators in 4D superconformal field theories. When the vacuum preserves the con…
Deconstructing Defects
Joseph Hayling, Vasilis Niarchos, Constantinos Papageorgakis
We use the exact-deconstruction prescription to lift various squashed- partition functions with supersymmetric-defect insertions to four-dimensional superconformal indices. St…
Deconstructing Little Strings with Gauge Theories on Ellipsoids
Joseph Hayling, Rodolfo Panerai, Constantinos Papageorgakis
A formula was recently proposed for the perturbative partition function of certain gauge theories on the round four-sphere, using an analytic-continuation argument i…
Exact Deconstruction of the 6D (2,0) Theory
Joseph Hayling, Constantinos Papageorgakis, Elli Pomoni +1
The dimensional-deconstruction prescription of Arkani-Hamed, Cohen, Kaplan, Karch and Motl provides a mechanism for recovering the -type (2,0) theories on , starting from a…
Aspects of Superconformal Multiplets in D>4
Matthew Buican, Joseph Hayling, Constantinos Papageorgakis
We explicitly construct and list all unitary superconformal multiplets, along with their index contributions, in five and six dimensions. From this data, we uncover various unifyin…
Argyres-Douglas Theories and S-Duality
Matthew Buican, Simone Giacomelli, Takahiro Nishinaka +1
We generalize S-duality to N=2 superconformal field theories (SCFTs) with Coulomb branch operators of non-integer scaling dimension. As simple examples, we find minimal generalizat…
Instanton-soliton loops in 5D super-Yang-Mills
Constantinos Papageorgakis, Andrew B. Royston
Soliton contributions to perturbative processes in QFT are controlled by a form factor, which depends on the soliton size. We provide a demonstration of this fact in a class of sca…
Constraints on Chiral Operators in N=2 SCFTs
Matthew Buican, Takahiro Nishinaka, Constantinos Papageorgakis
We study certain higher-spin chiral operators in N=2 superconformal field theories (SCFTs). In Lagrangian theories, or in theories related to Lagrangian theories by generalized Arg…
Scalar Soliton Quantization with Generic Moduli
Constantinos Papageorgakis, Andrew B. Royston
We canonically quantize multi-component scalar field theories in the presence of solitons. This extends results of Tomboulis to general soliton moduli spaces. We derive the quantum…
Revisiting Soliton Contributions to Perturbative Amplitudes
Constantinos Papageorgakis, Andrew B. Royston
It is often said that soliton contributions to perturbative processes in QFT are exponentially suppressed by a form factor. We provide a new derivation of this form factor for a cl…