4 papers
Gauging in superconductors and other electronic systems
Marcus Berg, Andrea Cappelli, Riccardo Villa
Ordinary, s-wave superconductors have been recognized as being topological phases of matter, in which the dynamical gauge field implies less understood global features. Using the t…
On gauging Abelian extensions of finite and U(1) groups
Riccardo Villa
We consider Abelian extensions of global symmetries of the form , with finite. For a quantum field theory with symmetry , we compare gauging …
Bosonizations and dualities in 2+1 dimensions
Andrea Cappelli, Riccardo Villa
We discuss two methods for relating bosonic and fermionic relativistic field theories in 2+1 dimensions, the gauging and the flux attachment. The first is primarily a corre…
Bosonization of 2+1 dimensional fermions on the surface of topological insulators
Andrea Cappelli, Lorenzo Maffi, Riccardo Villa
Three-dimensional topological insulators can be described by an effective field theory involving two `hydrodynamic' Abelian gauge fields. The action contains a bulk topological BF…