Conductance quantum = 7.748 091 729... × 10−5 S
- Value
- 7.748 091 729... × 10−5
- Unit
- S
- Uncertainty
- exact (by definition)
- Copy-ready
7.748091729e-5
The conductance quantum G₀ = 2e²/h: the conductance of one perfectly transmitting electron channel, spin included.
Seen as conductance steps in quantum point contacts and atomic-scale wires; its inverse is listed beneath.
The same quantity, other ways NIST lists it
| Quantity (NIST name) | Value | Unit | Uncertainty |
|---|---|---|---|
| Inverse of conductance quantum | 12 906.403 72... | Ω | exact |
NIST, Fundamental Physical Constants — Complete Listing (2022 CODATA adjustment), retrieved 2026-07-26.
Electrical, thermal and X-ray constants
Angstrom starConductance quantumCopper x unitElectron charge to mass quotientFermi coupling constantFirst radiation constantHartree energyJosephson constantLattice parameter of siliconLattice spacing of ideal Si (220)Loschmidt constant (273.15 K, 101.325 kPa)Magnetic flux quantumMolar mass constantMolar mass of carbon-12Molar Planck constantMolar volume of siliconMolybdenum x unitNeutron-proton mass differenceProton charge to mass quotientQuantum of circulationSackur-Tetrode constant (1 K, 101.325 kPa)Second radiation constantVon Klitzing constantWeak mixing angleWien frequency displacement law constantW to Z mass ratio