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Strong quantum interactions prevent quasiparticle decay
Ruben Verresen, Frank Pollmann, Roderich Moessner
Quantum states of matter---such as solids, magnets and topological phases---typically exhibit collective excitations---phonons, magnons, anyons. These involve the motion of many pa…
Quantum Dynamics of the Square-Lattice Heisenberg Model
Ruben Verresen, Frank Pollmann, Roderich Moessner
Despite nearly a century of study of the Heisenberg model on the square lattice, there is still disagreement on the nature of its high-energy excitations. By tuning toward…
Asymptotic Correlations in Gapped and Critical Topological Phases of 1D Quantum Systems
Nick G. Jones, Ruben Verresen
Topological phases protected by symmetry can occur in gapped and---surprisingly---in critical systems. We consider non-interacting fermions in one dimension with spinless time-reve…