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Experimental demonstration of low-noise winding number measurements in two topological lattices, indicating new measurement techniques.
We introduce and experimentally demonstrate cascaded heterodyning as a technique for low-noise, single-shot winding number measurements of two lattices supporting symmetry-protected topology: the Su-Schrieffer-Heeger (SSH) and extended SSH models, realized on a driven-dissipative photonic molecule.
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Srikanth et al. (2025) studied this question.
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