Research explores spin dynamics and decoherence in Er3+ ions, suggesting enhancements for quantum repeater networks.
Single Er 3+ ions in CaWO 4 coupled to nanophotonic cavities enable indistinguishable single-photon emission and spin-photon entanglement in the telecom band, forming building blocks for quantum repeater networks. However, spin decoherence from paramagnetic impurities limits fidelity. We investigate spin dynamics of near-surface Er ions (~10-15 nm from surface) as a step toward quantum repeaters and memory.
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Boddeti et al. (2025) studied this question.
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