204 citations · 1.4k across the 43 of their papers we have counts for
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Quantum Field Theory Anomalies in Condensed Matter Physics
R. Arouca, Andrea Cappelli, T. H. Hansson
We give a pedagogical introduction to quantum anomalies, how they are calculated using various methods, and why they are important in condensed matter theory. We discuss axial, chi…
Three-dimensional Topological Insulators and Bosonization
Andrea Cappelli, Enrico Randellini, Jacopo Sisti
Massless excitations at the surface of three-dimensional time-reversal invariant topological insulators possess both fermionic and bosonic descriptions, originating from band theor…
Multipole Expansion in the Quantum Hall Effect
Andrea Cappelli, Enrico Randellini
The effective action for low-energy excitations of Laughlin's states is obtained by systematic expansion in inverse powers of the magnetic field. It is based on the W-infinity symm…
Stability of Topological Insulators with Non-Abelian Edge Excitations
Andrea Cappelli, Enrico Randellini
Chiral-antichiral pairs of non-Abelian Hall states, like the Pfaffian, Read-Rezayi and NASS states, can be used to model two-dimensional time-reversal invariant topological insulat…
Partition Functions and Stability Criteria of Topological Insulators
Andrea Cappelli, Enrico Randellini
The non-chiral edge excitations of quantum spin Hall systems and topological insulators are described by means of their partition function. The stability of topological phases prot…
Composite Fermion Wavefunctions Derived by Conformal Field Theory
Andrea Cappelli
The Jain theory of hierarchical Hall states is reconsidered in the light of recent analyses that have found exact relations between projected Jain wavefunctions and conformal field…