K_J
E629520
K_J is the standard symbol used to denote the Josephson constant, a fundamental physical constant relating voltage and frequency in superconducting Josephson junctions.
Statements (37)
| Predicate | Object |
|---|---|
| instanceOf |
fundamental constant
ⓘ
physical constant ⓘ |
| appearsIn | Josephson voltage-frequency relation NERFINISHED ⓘ |
| category | quantum electrical constant ⓘ |
| definedBy | K_J = 2e / h ⓘ |
| definesRelation |
K_J = f / V
ⓘ
V = (1 / K_J) · f ⓘ |
| dependsOnConstant |
Planck constant h
NERFINISHED
ⓘ
elementary charge e NERFINISHED ⓘ |
| fullName | Josephson constant NERFINISHED ⓘ |
| governs | frequency of Josephson radiation for a given voltage ⓘ |
| hasDimension | T⁻¹·I⁻¹·M·L² (via Hz·V⁻¹) ⓘ |
| hasExactValue |
483597.8484 GHz·V⁻¹
ⓘ
483597.8484 × 10^9 Hz·V⁻¹ ⓘ |
| hasExactValueSince | 2019-05-20 ⓘ |
| hasUncertainty | 0 (defined exact by SI) ⓘ |
| hasUnit | hertz per volt ⓘ |
| hasUnitSymbol | Hz·V⁻¹ ⓘ |
| isExactIn | revised SI based on fixed e and h ⓘ |
| isReciprocalOf | Josephson constant inverse (V·Hz⁻¹) used as flux quantum over h ⓘ |
| namedAfter | Brian D. Josephson NERFINISHED ⓘ |
| partOf | International System of Units NERFINISHED ⓘ |
| relatedConstant | von Klitzing constant R_K NERFINISHED ⓘ |
| relatedEffect |
AC Josephson effect
NERFINISHED
ⓘ
DC Josephson effect NERFINISHED ⓘ |
| relatesQuantity |
frequency
ⓘ
voltage ⓘ |
| standardizedBy |
BIPM
NERFINISHED
ⓘ
CODATA NERFINISHED ⓘ |
| symbolFor | Josephson constant NERFINISHED ⓘ |
| usedFor |
Josephson voltage standards
NERFINISHED
ⓘ
realization of the volt ⓘ |
| usedIn |
Josephson effect
NERFINISHED
ⓘ
calibration of voltage measurement instruments ⓘ quantum electrical metrology ⓘ superconducting Josephson junctions ⓘ voltage standards ⓘ |
Referenced by (1)
Full triples — surface form annotated when it differs from this entity's canonical label.