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A Logical Qubit Got a Four-Part Scale Test
Reliability, scale, capability and performance form a proposed common definition for utility-grade error correction.
Summary
Reliability, scale, capability and performance form a proposed common definition for utility-grade error correction.
Logical-qubit demonstrations often optimize one metric while leaving replication, decoding latency or universal operations implicit. This paper defines a scalable logical qubit as one preserved through repeated correction for long computations, able to perform fault-tolerant universal operations with low-latency decoding and feedback, and replicable into the hundreds or thousands. It organizes comparison around four coupled dimensions: reliability, scale, capability and performance. The framework is a measurement proposal, not evidence that a current platform already meets the full definition.
Why it matters
Reliability, scale, capability and performance form a proposed common definition for utility-grade error correction.
Limits and context
- The framework is a measurement proposal, not evidence that a current platform already meets the full definition.
Key claims
Reliability, scale, capability and performance form a proposed common definition for utility-grade error correction.
Qualification: The framework is a measurement proposal, not evidence that a current platform already meets the full definition.
Evidence: source-2026-09-18-015
Sources
- arXiv preprint 2609.20549arXiv · primary research
Corrections
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