Josephson voltage standard
E629521
A Josephson voltage standard is a highly precise quantum-based device that uses the Josephson effect in superconducting junctions to generate and maintain an extremely accurate reference voltage for electrical metrology.
Statements (46)
| Predicate | Object |
|---|---|
| instanceOf |
quantum electrical standard
ⓘ
voltage standard ⓘ |
| accuracyLevel | on the order of 10^-10 or better ⓘ |
| advantage |
direct link between voltage and fundamental constants
ⓘ
excellent reproducibility between laboratories ⓘ |
| basedOn | Josephson effect NERFINISHED ⓘ |
| dependsOn |
Planck constant
NERFINISHED
ⓘ
elementary charge ⓘ |
| developedFor | quantum-based realization of electrical units ⓘ |
| enables |
calibration of voltage references
ⓘ
high-precision digital multimeter calibration ⓘ traceable voltage calibration ⓘ |
| field |
electrical metrology
ⓘ
quantum metrology ⓘ |
| governedBy | Josephson constant NERFINISHED ⓘ |
| hasComponent |
Josephson junction array
NERFINISHED
ⓘ
bias circuitry ⓘ cryostat ⓘ microwave source ⓘ |
| hasPrinciple |
frequency-to-voltage conversion
ⓘ
quantized voltage steps ⓘ |
| hasProperty |
extremely high accuracy
ⓘ
long-term stability ⓘ quantized voltage levels ⓘ |
| hasType |
conventional Josephson voltage standard
ⓘ
programmable Josephson voltage standard NERFINISHED ⓘ |
| measurementRange | from microvolts to tens of volts using junction arrays ⓘ |
| operatesAt | microwave frequencies ⓘ |
| programmableTypeEnables | synthesized arbitrary voltage waveforms ⓘ |
| programmableTypeUses | pulse-driven Josephson junction arrays ⓘ |
| purpose |
generation of highly accurate reference voltages
ⓘ
realization of the volt ⓘ |
| relatedTo |
Josephson effect
NERFINISHED
ⓘ
SI unit volt ⓘ |
| relation | V = (n·h·f)/(2e) ⓘ |
| replaced | Zener-diode-based voltage standards in high-accuracy applications ⓘ |
| requires |
cryogenic temperatures
ⓘ
precise frequency control ⓘ superconducting state ⓘ |
| standardizedBy | International Bureau of Weights and Measures NERFINISHED ⓘ |
| usedBy |
calibration laboratories
ⓘ
national metrology institutes ⓘ |
| usedIn |
international voltage comparisons
ⓘ
maintenance of national voltage standards ⓘ |
| uses |
microwave radiation
ⓘ
superconducting tunnel junctions ⓘ |
Referenced by (1)
Full triples — surface form annotated when it differs from this entity's canonical label.