Entanglement preservation over arbitrary distances in quantum repeater networks is possible if and only if the channel has a correctable subspace, with parallel channel uses needing logarithmic scaling otherwise.
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Entanglement boosting protocol prepares logical Bell pairs in rotated surface codes with orders-of-magnitude lower link-limited volume, reaching 10^{-10} logical error from 86 physical pairs at 1% error using soft decoders and postselection within one patch.
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Asymptotic Limits of Entanglement Distribution
Entanglement preservation over arbitrary distances in quantum repeater networks is possible if and only if the channel has a correctable subspace, with parallel channel uses needing logarithmic scaling otherwise.
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Entanglement boosting: Low-volume logical Bell pair preparation for distributed fault-tolerant quantum computation
Entanglement boosting protocol prepares logical Bell pairs in rotated surface codes with orders-of-magnitude lower link-limited volume, reaching 10^{-10} logical error from 86 physical pairs at 1% error using soft decoders and postselection within one patch.