831 citations · 8k across the 103 of their papers we have counts for
3 papers · 2 filters
Information propagation for interacting particle systems
Norbert Schuch, Sarah K. Harrison, Tobias J. Osborne +1
We show that excitations of interacting quantum particles in lattice models always propagate with a finite speed of sound. Our argument is simple yet general and shows that by focu…
Computational Difficulty of Computing the Density of States
Brielin Brown, Steven T. Flammia, Norbert Schuch
We study the computational difficulty of computing the ground state degeneracy and the density of states for local Hamiltonians. We show that the difficulty of both problems is exa…
PEPS as ground states: degeneracy and topology
Norbert Schuch, Ignacio Cirac, David Perez-Garcia
We introduce a framework for characterizing Matrix Product States (MPS) and Projected Entangled Pair States (PEPS) in terms of symmetries. This allows us to understand how PEPS app…