Ramping through an extensively degenerate point eliminates Kibble-Zurek scaling and damps Stückelberg oscillations, while square-pulse driving at commensurate frequencies creates an approximate emergent U(1) symmetry.
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Quantum dynamics of a spin model with an extensive degeneracy
Ramping through an extensively degenerate point eliminates Kibble-Zurek scaling and damps Stückelberg oscillations, while square-pulse driving at commensurate frequencies creates an approximate emergent U(1) symmetry.