356 citations · 2.7k across the 47 of their papers we have counts for
14 papers · 1 filter
Chiral Lattice Gauge Theories from Symmetry Disentanglers
Ryan Thorngren, John Preskill, Lukasz Fidkowski
We propose a Hamiltonian framework for constructing chiral gauge theories on the lattice based on symmetry disentanglers: constant-depth circuits of local unitaries that transform…
Symmetry Breaking from Monopole Condensation in QED
Thomas T. Dumitrescu, Pierluigi Niro, Ryan Thorngren
QED in three dimensions with an doublet of massless, charge-1 Dirac fermions (and no Chern-Simons term) has a symmetry…
A Long Exact Sequence in Symmetry Breaking: order parameter constraints, defect anomaly-matching, and higher Berry phases
Arun Debray, Sanath K. Devalapurkar, Cameron Krulewski +3
We study defects in symmetry breaking phases, such as domain walls, vortices, and hedgehogs. In particular, we focus on the localized gapless excitations which sometimes occur at t…
Fusion Category Symmetry II: Categoriosities at c = 1 and Beyond
Ryan Thorngren, Yifan Wang
We study generalized symmetries of quantum field theories in 1+1D generated by topological defect lines with no inverse. This paper follows our companion paper on gapped phases and…
Anomalous Symmetries End at the Boundary
Ryan Thorngren, Yifan Wang
A global symmetry of a quantum field theory is said to have an 't Hooft anomaly if it cannot be promoted to a local symmetry of a gauged theory. In this paper, we show that the ano…
Fusion Category Symmetry I: Anomaly In-Flow and Gapped Phases
Ryan Thorngren, Yifan Wang
We study generalized discrete symmetries of quantum field theories in 1+1D generated by topological defect lines with no inverse. In particular, we describe 't Hooft anomalies and…