Symmetry-resolved entanglement in critical non-Hermitian systems
Michele Fossati, Filiberto Ares, Pasquale Calabrese
Abstract
Non-Hermitian quantum systems display unusual features that set them apart from the Hermitian ones, yet their understanding is still very poor. Here, by studying how entanglement distributes in the symmetry sectors, the authors manage to explain one of these elusive features, namely, the origin of the nonpositiveness of the reduced density.
Topics & Concepts
Hermitian matrixQuantum entanglementSymmetry (geometry)Theoretical physicsSet (abstract data type)QuantumPhysicsQuantum mechanicsPure mathematicsMathematicsComputer scienceGeometryProgramming languageQuantum Mechanics and Non-Hermitian PhysicsQuantum chaos and dynamical systemsQuantum, superfluid, helium dynamics