Entanglement entropy across the dynamical phase transition in the quantum O(N) model
This study investigates how a dynamical phase transition (DPT) in a large-N quantum O(N) model affects its entanglement spectrum far from equilibrium. The research found that while entanglement entropy follows standard volume laws, the critical point generates unique logarithmic corrections to this law. These corrections are governed by the transition's scaling properties and reveal universal fingerprints in the system's low-energy structure.