356 citations · 2.7k across the 47 of their papers we have counts for
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state is not the unique ground state of any local Hamiltonian
Lei Gioia, Ryan Thorngren
The characterization of ground states among all quantum states is an important problem in quantum many-body physics. For example, the celebrated entanglement area law for gapped Ha…
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…
Higgs Condensates are Symmetry-Protected Topological Phases: II. Gauge Theory and Superconductors
Ryan Thorngren, Tibor Rakovszky, Ruben Verresen +1
Classifying Higgs phases within the landscape of gapped and symmetry preserving states of matter presents a conceptual challenge. We argue that Higgs phases are symmetry-pro…