>>29
Equation ( 5 ) is linked to the fundamental quantum-mechanical uncertainty relation for a Josephson junction between the superconducting grain and reservoir (≒ pool, basin), the uncertain relation is re-written as Δn・Δφ ≧ 1 .
Thus, the superconducting phase difference φ between the island and reservoir can’t be determined simultaneously with the number of electron pairs n on the island.
In other words, as it’s analogous to making such a condition hold for an optical pulse in a fiber, the number of photons in the pulse can’t be fixed simultaneously with the phase of the pulse.
