Abstract
We review universal relaxation dynamics in quantum systems by focusing on the Kibble–Zurek mechanism, coarsening dynamics, and non-thermal fixed points. The first two subjects have recently been applied to quantum systems to explore universal phenomena. The last one concerns universal scale-invariant relaxation dynamics in isolated quantum systems. We overview the theoretical foundations of the universal properties and recent experiments on these topics on the basis of a quantum spin model, the Gross–Pitaevskii theory, and kinetic equations.
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