Programmable Preparation of Topological Entangled States
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M. Javad Zakeri, Alaric Pan, Darren D Hudson, Andrea Blanco-Redondo · arXiv: 2610.22738v1 · Summary page
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Shaping entanglement with a programmable light pump
Topological photonic structures can provide optical modes protected by symmetry, but the entangled states they generate are often constrained by the structure’s geometry. An experimental preprint demonstrates a more flexible approach: shaping the light that pumps an integrated silicon photonic lattice to select the structure of the photon-pair state it produces.
The team tailored pump superpositions to address particular two-photon states, steer measured correlations and target different numbers of entangled modes. Measurements were reproducible across nominally identical devices despite fabrication-induced disorder. The significance is not that topology removes every source of error, but that it may coexist with useful programmability—a combination needed if such devices are to supply tailored states for quantum communication and photonic computing.
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