In a driven topological free-fermion chain, the entanglement spectrum exhibits robust subharmonic period-doubling when initialized as a superposition of zero-pi edge modes, vanishing for stationary states or in the trivial phase.
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Locked Subharmonic Oscillations in the Entanglement Spectrum of a Periodically Driven Topological Chain
In a driven topological free-fermion chain, the entanglement spectrum exhibits robust subharmonic period-doubling when initialized as a superposition of zero-pi edge modes, vanishing for stationary states or in the trivial phase.