Balanced imaginary hoppings and staggered potentials preserve a bipartite lattice's spectrum and turn zero-energy edge states into coalescing modes that are dynamically self-healing.
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Dynamically stable topological edge states in an extended Su-Schrieffer-Heeger ladder with balanced perturbation
Balanced imaginary hoppings and staggered potentials preserve a bipartite lattice's spectrum and turn zero-energy edge states into coalescing modes that are dynamically self-healing.