A University of Pennsylvania-led team has successfully demonstrated the on-chip transfer of photonic quantum skyrmions, topological light structures, from single photons to entangled states. This was achieved using integrated nanophotonic chips and established a noise-resilient quantum state transfer mechanism. The research, published in Nature Physics, shows that the skyrmion number, a robust quantum observable, remains intact even when entanglement vanishes, offering a new approach for noise-tolerant quantum optical interconnects.
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