Qubit ZooQubit Readout is a classical hardware readout approach for quantum computing hardware. Source: latex text.
Abstract
Magic-state cultivation has so far focused mainly on single-qubit non-Clifford resources. We develop a direct cultivation architecture for the entangled state . Two commuting Clifford involutions project onto four usable branches related by Pauli-frame updates. A minimal six-bit record protects the branch label against readout errors that map one valid record to another. Verified CAT gadgets, Steane error detection, CZZ-based controlled checks, and immediate Steane-to-surface expansion form the complete factory. The decoder uses 263 operational detector bits, while 168 additional bits are withheld for later validation. Decoding proceeds through exact low-order resolution, a precomputed higher-order catalogue, and four-coset BP+OSD. Under the stated active-location stochastic-Pauli model, exact enumeration finds no accepted closed-boundary logical-failure mechanism through fault order two, while explicit order-three failure mechanisms exist. Finite- simulations quantify acceptance, residual syndromes, and decoder workload, and targeted sampling of order-three faults estimates the leading logical-error channels. Optimizing the direct expansion reduces accepted-output operation count by approximately 35—37%. We compare the two routes at the same binary logical-error rate. Direct CS remains cheaper in operation count at the two lower-noise benchmark points even when the three- route is given pre-existing output patches. The ordering reverses between and . These results show that an entangled non-Clifford state can be cultivated directly with a protected branch record and an explicitly certified fault-order-three output channel.
Key Findings
Links
- arXiv: 2609.09993
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