Landauer–Büttiker Transport

Quantum conductance quantization · transmission through scatterer · G = (e²/h)·ΣTₙ

Parameters

Modes M
ΣTₙ
G (e²/h)
Resistance (h/e²)
Landauer formula:
G = (2e²/h) Σₙ Tₙ

Each mode n carries Tₙ ∈ [0,1]. For perfect channels, G = N·2e²/h quantized.

Scattering reduces Tₙ. Anderson disorder → localization → G→0.