A spin-chain model is shown to support a quantized topological domain-wall pump whose ground state spontaneously breaks Z2 symmetry while remaining inversion-protected.
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Topological domain-wall pump with $\mathbb{Z}_2$ spontaneous symmetry breaking
A spin-chain model is shown to support a quantized topological domain-wall pump whose ground state spontaneously breaks Z2 symmetry while remaining inversion-protected.