Researchers from Sandia National Laboratories and Quantinuum have introduced "Logical GST," a protocol that provides the first self-consistent, full tomographic reconstruction of a universal single-qubit logical gate set. This was implemented on a single logical qubit encoded in the [[7, 1, 3]] Steane code on the Quantinuum System Model H1-1. The study confirmed the assumption that quantum error correction converts complex physical noise into simple, uncorrelated Pauli-stochastic channels, but high-shot emulation revealed small but statistically significant logical non-Markovianity and coherent logical over-rotations.
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