Dynamical quantum phase transition with singular multipartite entanglement
The study investigates a novel dynamical quantum phase transition (DQPT) in a 1D Ising model during time evolution after a quench. It finds this transition is marked by a divergent multipartite entanglement quantified by the Quantum Fisher Information (QFI). This new transition is driven by the constructive interference of excited states and holds potential for quantum metrology applications.