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Created page with "== Introduction == The Josephson constant, denoted as \( K_J \), is a fundamental physical constant that plays a crucial role in the realm of superconductivity and quantum electronics. It is named after the British physicist Brian D. Josephson, who first predicted the Josephson effect in 1962. This constant is intimately related to the Josephson effect, which describes the quantum mechanical phenomenon of supercurrent—an electric current that flows indefinitely withou..."
