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Lectures on 4d N=1 dynamics and related topics
Yuji Tachikawa
This lecture series consists of mostly independent three parts: Part 1: a tour of basic 4d N=1 supersymmetric dynamics, covering the pure super Yang-Mills, the Seiberg duality for…
Compactifications of 6d SCFTs with non-trivial Stiefel-Whitney classes
Kantaro Ohmori, Yuji Tachikawa, Gabi Zafrir
We consider compactifications of very Higgsable 6d SCFTs on with non-trivial Stiefel-Whitney classes (or equivalently 't Hooft magnetic fluxes) introduced for thei…
Comments on the twisted punctures of class S theory
Yuji Tachikawa, Yifan Wang, Gabi Zafrir
We point out that the symmetry associated to a full twisted puncture of a class S theory of type has the global anomaly associated to $π_4(\text{USp})=…
A study of time reversal symmetry of abelian anyons
Yasunori Lee, Yuji Tachikawa
We perform a study of time reversal symmetry of abelian anyons in 2+1 dimensions, in the spin structure independent cases. We will find the importance of the group $\…
The frozen phase of F-theory
Lakshya Bhardwaj, David R. Morrison, Yuji Tachikawa +1
We study the interpretation of O7+ planes in F-theory, mainly in the context of the six-dimensional models. In particular, we study how to assign gauge algebras and matter content…
Why are fractional charges of orientifolds compatible with Dirac quantization?
Yuji Tachikawa, Kazuya Yonekura
Orientifold -planes with have fractional D-charges, and therefore appear inconsistent with Dirac quantization with respect to D-branes. We explain in detail ho…