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"Entanglement evolution and generalised hydrodynamics: interacting integrable systems" by Vincenzo Alba, Bruno Bertini and Maurizio Fagotti has received the Select label. Warm congratulations to the authors!

In this very readable paper, the authors study the entanglement evolution of integrable quantum models. In particular, they focus on the entanglement entropy after a global quench from inhomogeneous states. They combine the ideas of pair particle production with the formalism of generalised hydrodynamics to develop a formula capturing the dynamics of the entanglement entropy. They found that the half chain entanglement rate depends only on the physics at the interface, and it differs from the rate of exchange of thermodynamic entropy. This contrasts with the behaviour in free or homogeneous interacting integrable systems, where the two rates coincide. These results were tested in the Heisenberg chain, finding good agreement with DMRG simulations. This paper makes interesting points regarding the definition of the entanglement entropy, and it calls attention to several interesting directions for future research.