281 citations · 837 across the 20 of their papers we have counts for
23 papers
Maximal Enhancements in Eight-Dimensional Non-Supersymmetric Heterotic Strings
Yamato Honda, Justin Kaidi, Yuichi Koga +1
We classify maximally enhanced, rank-preserving non-supersymmetric heterotic strings in eight dimensions by studying orbifolds of supersymmetric heterotic strings on . We firs…
Parafermionizing the Monster
Yamato Honda, Justin Kaidi, Ippo Orii
We study the parafermionization of the Monster CFT with respect to its subgroups, with an odd prime. Under certain assumptions, we show that the parafermioniz…
Introduction to Generalized Symmetries
Justin Kaidi
These notes were prepared for a series of intensive lectures delivered at Hokkaido University, Nagoya University, Kyoto University, and Kyushu University. We begin with a brief rev…
Haagerup Symmetry in ?
Jan Albert, Yamato Honda, Justin Kaidi +1
We suggest that the chiral theory -- in many senses the simplest VOA -- may have Haagerup symmetry for . Likewise, we suggest that the…
The SymTFT for -ality defects: Part I
Justin Kaidi, Xiaoyi Shi, Soichiro Shimamori +1
In order to obtain the SymTFT for a theory with an -ality extension of a discrete, Abelian group , one begins by considering a bulk -gauge theory, and then gauges an appro…
On non-supersymmetric heterotic branes
Justin Kaidi, Yuji Tachikawa, Kazuya Yonekura
A uniform construction of non-supersymmetric 0-, 4-, 6- and 7-branes in heterotic string theory was announced and outlined in our letter \cite{Kaidi:2023tqo}. In this full paper, w…
On a class of selection rules without group actions in field theory and string theory
Justin Kaidi, Yuji Tachikawa, Hao Y. Zhang
We discuss a class of selection rules which i) do not come from group actions on fields, ii) are exact at tree level in perturbation theory, iii) are increasingly violated as the l…
Non-supersymmetric heterotic branes
Justin Kaidi, Kantaro Ohmori, Yuji Tachikawa +1
The common statement that any consistent quantum gravity theory contains dynamical objects with all possible charges suggests that there are still a number of hitherto-unidentified…
Symmetry TFTs and Anomalies of Non-Invertible Symmetries
Justin Kaidi, Emily Nardoni, Gabi Zafrir +1
It is known that the 't Hooft anomalies of invertible global symmetries can be characterized by an invertible TQFT in one higher dimension. The analogous statement remains to be un…
Non-invertible Symmetries of Class Theories
Vladimir Bashmakov, Michele Del Zotto, Azeem Hasan +1
We study the non-invertible symmetries of class theories obtained by compactifying the type 6d (2,0) theory on a genus Riemann surface with n…
Topological modularity of Supermoonshine
Jan Albert, Justin Kaidi, Ying-Hsuan Lin
The theory of topological modular forms (TMF) predicts that elliptic genera of physical theories satisfy a certain divisibility property, determined by the theory's gravitational a…
Symmetry TFTs for Non-Invertible Defects
Justin Kaidi, Kantaro Ohmori, Yunqin Zheng
Given any symmetry acting on a -dimensional quantum field theory, there is an associated -dimensional topological field theory known as the Symmetry TFT (SymTFT). The Sym…
Non-Invertible Symmetries of SYM and Twisted Compactification
Justin Kaidi, Gabi Zafrir, Yunqin Zheng
Non-invertible symmetries have recently been understood to provide interesting contraints on RG flows of QFTs. In this work, we show how non-invertible symmetries can also be used…
Exceptional moduli spaces for exceptional theories
Justin Kaidi, Mario Martone, Gabi Zafrir
It is expected on general grounds that the moduli space of 4d theories is of the form , with the rank and a crystallographic complex refl…
Needles in a haystack: An algorithmic approach to the classification of 4d SCFTs
Justin Kaidi, Mario Martone, Leonardo Rastelli +1
There is a well-known map from 4d superconformal field theories (SCFTs) to 2d vertex operator algebras (VOAs). The 4d Schur index corresponds to the VOA vacuum char…
Kramers-Wannier-like duality defects in (3+1)d gauge theories
Justin Kaidi, Kantaro Ohmori, Yunqin Zheng
We introduce a class of non-invertible topological defects in (3+1)d gauge theories whose fusion rules are the higher-dimensional analogs of those of the Kramers-Wannier defect in…
Holomorphic modular bootstrap revisited
Justin Kaidi, Ying-Hsuan Lin, Julio Parra-Martinez
In this work we revisit the "holomorphic modular bootstrap", i.e. the classification of rational conformal field theories via an analysis of the modular differential equations sati…
Higher central charges and topological boundaries in 2+1-dimensional TQFTs
Justin Kaidi, Zohar Komargodski, Kantaro Ohmori +2
A 2+1-dimensional topological quantum field theory (TQFT) may or may not admit topological (gapped) boundary conditions. A famous necessary, but not sufficient, condition for the e…
A new rank-2 Argyres-Douglas theory
Justin Kaidi, Mario Martone
We provide evidence for the existence of a new strongly-coupled four dimensional superconformal field theory arising as a non-trivial IR fixed point on the Coulomb…
Stable Vacua for Tachyonic Strings
Justin Kaidi
In addition to the familiar string theories with spacetime supersymmetry, there exist a number of non-supersymmetric ten-dimensional superstrings. Nearly all of these theories have…
Discreteness and Integrality in Conformal Field Theory
Justin Kaidi, Eric Perlmutter
Various observables in compact CFTs are required to obey positivity, discreteness, and integrality. Positivity forms the crux of the conformal bootstrap, but understanding of the a…
Topological Superconductors on Superstring Worldsheets
Justin Kaidi, Julio Parra-Martinez, Yuji Tachikawa +1
We point out that different choices of Gliozzi-Scherk-Olive (GSO) projections in superstring theory can be conveniently understood by the inclusion of fermionic invertible phases,…
GSO projections via SPT phases
Justin Kaidi, Julio Parra-Martinez, Yuji Tachikawa
We point out that the choice of phases in GSO projections can be accounted for by a choice of fermionic SPT phases on the worldsheet of the string. This point of view not only easi…