Quantum Computing, Fault Tolerance, Error Correction, Logical Qubits.
https://arxiv.org/abs/2009.11482 17 “In the surface code framework, the smallest logical qubit that corrects for both phase (Z) and bit flip (X) errors needs 17 physical qubits.” https://www.ncbi.nlm.nih.gov/books/NBK538709/ Less than a dozen: 9 “Peter Shor’s 9-qubit-code, a.k.a. the Shor code,