Single-Shot Error Correction at Optimal Spacetime Cost
A preprint shows an explicit fault-tolerant construction that achieves the optimal spacetime scaling for storing K logical qubits for S time steps under independent erasures, matching a previously established lower bound. Earlier, such optimal scaling had only been achieved assuming ideal error correction; the new work removes that idealization by permitting noise in the protocol.
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What this could mean
- 0–2 yearsPlausible
This explicit noisy construction could let experimental groups working with erasure-dominated platforms, such as neutral-atom or trapped-ion systems, test near-optimal single-shot error-correcting codes and lower overhead in small fault-tolerant memory demonstrations.
Because the construction is explicit rather than existential, its parameters and decoders can in principle be translated to circuit-level implementations; erasure errors are already actively pursued in neutral-atom and trapped-ion experiments, providing a plausible near-term testbed if the noise model matches.
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