Entanglement transitions as a probe of quasiparticles and quantum thermalization
Tsung-Cheng Lu, Tarun Grover
Abstract
The authors find that the entanglement between two subsystems in tripartite quantum states can reveal novel aspects of quantum thermalization. In particular, it can probe the presence or absence of long-lived quasiparticles. Systems without quasiparticles exhibit an ``entanglement transition'' from area to volume law as one tunes the subsystem volume fraction within a single representative state, a feature invisible in conventional schemes based on bipartite entanglement. Such a transition is absent in systems with quasiparticles.
Topics & Concepts
QuasiparticleQuantum entanglementThermalisationPhysicsQuantum mechanicsQuantumQuantum discordCondensed matter physicsSuperconductivityQuantum many-body systemsQuantum and electron transport phenomenaQuantum Information and Cryptography