Toy Josephson Coupling

Coupling Strength Is Not a Real Device Constant

The coupling factor here is a training scale on a toy energy ledger, not a measured hardware constant. Its arithmetic is exact only for the stated normalized factor and raw energy; real superconducting qubits need device-specific fitting, detuning checks, drift monitoring, and uncertainty on readout thresholds.

A normalized factor scales the toy coupling without claiming hardware constants. Exact arithmetic here means exact results for the stated model inputs; measured inputs still carry uncertainty and significant-figure limits.

highlighted = computed this step

A coupling factor scales the toy budget

The raw product is 6 joules and the normalized factor is 1/2.

12⋅6 J=3 J\tfrac{1}{2}\cdot 6\ \text{J}=3\ \text{J}
Scaled toy couplingThe scale factor is a checked training coefficient.current=3 Aflux=2 WbcouplingFactor=1/2couplingEnergy=3 J

The factor is not a hardware constant

The accepted toy coupling is 3 joules, but the lesson does not name a real junction constant.

Etoy=3 JE_{\text{toy}}=3\ \text{J}
Scope boundaryReal device vocabulary is rejected by the check.current=3 Aflux=2 WbcouplingFactor=1/2couplingEnergy=3 J