AQT's LYNX preprint separates processor size from benchmark scale
A processor characterization shows why the size of each benchmark belongs in the headline discussion.
Alpine Quantum Technologies researchers describe LYNX, a trapped-calcium-ion processor supporting up to 31 with all-to-all connectivity. Their October 23 preprint reports several benchmarks at clearly specified register sizes.[1]
In a 24-qubit register, randomized benchmarking gives an average single-qubit gate error of (8 plus or minus 5) times 10 to the minus 5. Interleaved randomized benchmarking reports an average two-qubit gate error of (2.84 plus or minus 0.08) times 10 to the minus 3.[1]
The processor also passes quantum-volume tests using up to 15 qubits, corresponding to a quantum volume of 2 to the power 15.[1]
Those register sizes are part of the result. The gate-error averages were measured in a 24-qubit register, while quantum volume was assessed using 15 qubits; neither number should be presented as the result of a full 31-qubit benchmark.[1]
The work offers a detailed hardware characterization. Its metrics do not by themselves show commercial quantum advantage or a fault-tolerant logical processor.[1]