Floquet topological edge states can zero out the PT symmetry breaking threshold when they overlap gain/loss defects, and they do so unconditionally at low driving frequencies.
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Controlling the $\mathcal{PT}$ Symmetry Breaking Threshold in Bipartite Lattice Systems with Floquet Topological Edge States
Floquet topological edge states can zero out the PT symmetry breaking threshold when they overlap gain/loss defects, and they do so unconditionally at low driving frequencies.