Effective Qubit Utilization

Effective Qubit Utilization is the share of a quantum system's physical qubits that remain usable once fidelity loss and decoherence are counted, expressed as an effective qubit number. The book states it among the Chapter 8.6 testable predictions, following PulseCore validation: the effective number is the physical count reduced by a fidelity efficiency and a coherence efficiency, and a utilization efficiency of at least 0.1 is the threshold to be verified through quantum system benchmarks. It belongs with the predictions that tie quantum computing into the Bit Curve: a sigmoid quantum transition around 2027 and an emergence threshold converging with the singularity by 2037 ± 4 years. The statement is N⊹ = N⚛⊡ × η≐ × η≋, where N⊹ is the effective qubit number, N⚛⊡ the number of physical qubits, η≐ the fidelity efficiency and η≋ the coherence efficiency; all are dimensionless. It connects to the Effective Qubit Count, PulseCore Qubit Validation, Throughput Efficiency, Bit Curve and Quantum Computational Enhancement.