IEVref: 121-13-26 ID: Language: en Status: Standard Term: alternating-current Josephson effect Synonym1: Synonym2: Synonym3: Symbol: Definition: macroscopic quantum effect in which, when a voltage U is applied across a Josephson junction, an alternating current of Cooper pairs flows by tunnelling through the junction, generating the emission of electromagnetic radiation having a frequency f proportional to the applied voltage: f = KjU where Kj = 2e/h is the Josephson constant, with e being the elementary electric charge and h the Planck constant NOTE 1 – The alternating-current Josephson effect also manifests itself conversely so that, when a Josephson junction is irradiated by electromagnetic radiation of frequency f, the voltage across it can assume quantized values equal to nf/Kj, where n is a positive integer. NOTE 2 – The value of the Josephson constant is 483 597,891(12) × 109 Hz V-1 (CODATA, 2006). Publication date: 2008-08 Source: Replaces: Internal notes: CO remarks: TC/SC remarks: VT remarks: Domain1: Domain2: Domain3: Domain4: Domain5: