30 papers
Higher Superspace Supergravity and its IR-Completions
Grigorios Giotopoulos, Hisham Sati, Urs Schreiber
It is an old idea that higher-dimensional super-gravity (SuGra) is put on-shell just by imposing Bianchi identities on super-field strengths over super-spacetimes subject to super-…
Flux Quantization on M-Strings
Pinak Banerjee, Hisham Sati, Urs Schreiber
The electric Gauss law in 11D SuGra is famously non-linear, whence its flux quantization must be in nonabelian cohomology. We have previously shown that the minimal admissible choi…
Higher Gauge Theory via Differential Nonabelian Cohomology
Hisham Sati, Urs Schreiber
This is a streamlined introduction to the global (infrared) completion of Maxwell-type higher gauge fields (as in the higher gauge sectors of higher dimensional supergravity and it…
Flux Quantization of Type IIA in Unstable K-Theory
Pinak Banerjee, Hisham Sati, Urs Schreiber
The traditional conjecture that RR-flux is quantized in stable K-cohomology fails to account for the presence of NS-brane sources: These impose nonlinear relations -- reductions of…
Bulk-Edge Correspondence via Higher Gauge Theory
Hisham Sati, Urs Schreiber
More profound than bulk topological order of quantum materials is only its unwinding via gapless excitations along boundaries of the sample. We recast this bulk-edge correspondence…
Engineering of Anyons on M5-Probes via Flux Quantization
Hisham Sati, Urs Schreiber
These extended lecture notes survey a novel derivation of anyonic topological order (as seen in fractional quantum Hall systems) on single magnetized M5-branes probing Seifert orbi…