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MENTAL MODEL · M5950

Josephson Effect

Josephson Effect
TechnicalHigh supportPhysics
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Version 1.0.0 · Updated 2026-07-30

CORE DEFINITION

When two superconductors are separated by a thin insulating layer, a supercurrent can tunnel directly through the barrier without any applied voltage (DC Josephson effect). This is a manifestation of macroscopic quantum effects.

SCAFFOLDING EFFECT

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Quantum tunneling through barriers. Between two highly coherent (superconducting) teams or individuals, even if there is a gap (insulating layer), information and tacit understanding can be transmitted losslessly through 'tunneling'. Coherence is the only condition for crossing the gap.

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A thin insulating barrier is sandwiched between two superconductors. Without voltage, a supercurrent can tunnel through (DC), while with voltage, AC oscillations appear (AC). This is direct evidence of macroscopic quantum coherence, and its prerequisite is that both sides are 'coherent/synchronized'.

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Source support: Explicit

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    en.wikipedia.orghttps://en.wikipedia.org/wiki/Josephson_effectZH · Explicit
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