I will discuss two methods for diagnosing ’t Hooft anomalies of
internal symmetries in 2+1d lattice systems. Anomalous symmetries
of this kind arise naturally at the boundary of 3+1D
symmetry-protected topological phases, and are known to be...
The Gaiotto-Moore-Witten "Algebra of the Infrared" allows one to
construct the category of supersymmetric boundary conditions for a
wide class of massive N=(2,2) QFTs in two dimensions. In
particular, it applies to N=(2,2) QFTs defined by a Morse...
While the vast majority of the light from our galaxy comes from
the Galactic disk, the vast majority of the mass of the Milky Way
(MW) is in its dark matter halo. Because we cannot directly observe
the MW's dark matter halo, we must use luminous...
In this talk I will discuss holographic duals of topological
operators. At low energy sugra, they can be realized by Page
charge associated to Gauss law constraints. In the UV string
theory, topological operators can be characterized by
various...
Recent observations reveal that cosmic rays (CRs) are more
tightly confined in various astrophysical systems (e.g. radio
bubbles) than current theories predict. I show that microscale
magnetic fluctuations, particularly from the mirror
instability...
