Exact Entanglement in the Driven Quantum Symmetric Simple Exclusion Process

Understand

Entanglement properties of driven quantum systems can potentially differ from the equilibrium situation due to long range coherences.

• We confirm this observation by studying a suitable toy model for mesoscopic transport~: the open quantum symmetric simple exclusion process (QSSEP).
• We derive exact formulae for its mutual information between different subsystems in the steady state and show that it satisfies a volume law.
• Surprisingly, the QSSEP entanglement properties only depend on data related to its transport properties and we suspect that such a relation might hold for more general mesoscopic systems.