AB period Φ_0 = h/e, phase-per-period = 2π (exact)

Closed-form evaluation of the Aharonov-Bohm phase identity. Gauge-invariant phase φ(Φ) = (2π/Φ_0)·Φ with Φ_0 = h/e. Period: the phase shift upon threading one flux quantum is Δφ = φ(Φ_0) − φ(0) = 2π — a complete interference-fringe cycle…