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IEVref: | 121-13-26 | ID: | |

Language: | en | Status: Standard | |

Term: | alternating-current Josephson effect | ||

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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:
where NOTE 1 – The alternating-current Josephson effect also manifests itself conversely so that, when a Josephson junction is irradiated by electromagnetic radiation of frequency NOTE 2 – The value of the Josephson constant is 483 597,891(12) × 10 | ||

Publication date: | 2008-08 | ||

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*f* = *K*_{j}*U*

where *K*_{j} = 2*e*/*h* is the Josephson constant, with *e* being the elementary electric charge and *h* the Planck constant
*nf*/*K*_{j}, where *n* is a positive integer.
^{-1} (CODATA, 2006).