2 citations · 2 across the 6 of their papers we have counts for
6 papers
Bosonic SPT and invertible phases and its relation to Steenrod's problem
Shota Saito, Yuji Tachikawa, Yi Zhang
Bosonic invertible and symmetry-protected topological (SPT) phases are well-known to be described by ordinary cohomology groups in low dimensions, but `beyond-cohomology' phases ap…
On Generalised Discrete Torsion
Philip Boyle Smith, Yuji Tachikawa
For a 2d gauged sigma model with target space and discrete gauge group , we consider a generalisation of Vafa's discrete torsion that assigns different local…
On holography with ADE singularities
Sunjin Choi, Yuji Tachikawa
We study aspects of the AdS/CFT correspondence for super Yang-Mills theory on , where is a finite subgroup, leading to an ADE singula…
On a long exact sequence of groups of equivalence classes of 2d SQFTs
Yuji Tachikawa
Strongly motivated by a mathematical result by Lin and Yamashita (arXiv:2412.02298), we describe a long exact sequence formed by groups of equivalence classes of two-dimensional $\…
On homomorphisms from finite subgroups of to Langlands dual pairs of groups
Yuki Kojima, Yuji Tachikawa
Let be the number of homomorphisms from to up to conjugation by . Physics of four-dimensional supersymmetric gauge theories predicts that $N(Γ,G…
Cancelling mod-2 anomalies by Green-Schwarz mechanism with
Shota Saito, Yuji Tachikawa
We study if and when mod-2 anomalies can be canceled by the Green-Schwarz mechanism with the introduction of an antisymmetric tensor field . As explicit examples, we examin…