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Two Logical Qubits Cross 93 Percent Bell Fidelity
A 120-qubit superconducting processor forms distance-three and distance-five surface codes, then entangles logical qubits through lattice surgery.
Summary
A 120-qubit superconducting processor forms distance-three and distance-five surface codes, then entangles logical qubits through lattice surgery.
The team reports logical error per round below one percent in selected codes, Bell-state fidelity above 93 percent and logical teleportation fidelities from 78 to 93 percent. Component selection and noise-informed decoding are part of the demonstrated stack.
Why it matters
A 120-qubit superconducting processor forms distance-three and distance-five surface codes, then entangles logical qubits through lattice surgery.
Limits and context
No additional limitation was separately recorded.
Key claims
A 120-qubit superconducting processor forms distance-three and distance-five surface codes, then entangles logical qubits through lattice surgery.
Evidence: source-2026-10-26-018
Sources
- arXiv preprint 2610.32347, original v1arXiv · primary research
Corrections
No corrections have been recorded for this story.