Josephson effect
E602114
The Josephson effect is a quantum mechanical phenomenon in which a supercurrent flows between two superconductors separated by a thin insulating barrier, enabling devices like SQUIDs and superconducting qubits.
All labels observed (2)
| Label | Occurrences |
|---|---|
| Josephson effect canonical | 4 |
| DC Josephson effect | 1 |
How this entity was disambiguated
This entity first appeared as the object of triple T6529544 — resolving that mention is where its identity was fixed. The disambiguator weighed these candidate entities and picked the highlighted one (or “None”, minting a new entity). This is how homonymy is resolved: the same surface form can point to different entities.
NED1
Entity disambiguation (via context triple)
gpt-5-mini-2025-08-07
Target entity: Josephson effect Context triple: [Giaever tunneling, relatedTo, Josephson effect]
-
A.
Meissner effect
The Meissner effect is the phenomenon in which a superconductor expels magnetic fields from its interior when cooled below its critical temperature, leading to perfect diamagnetism.
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B.
Josephson constant
The Josephson constant is a fundamental physical constant that relates frequency to voltage in superconducting Josephson junctions and underpins the quantum standard of voltage.
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C.
BCS theory of superconductivity
The BCS theory of superconductivity is a fundamental microscopic theory that explains superconductivity through the formation of Cooper pairs of electrons and their collective quantum behavior in a solid.
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D.
de Haas–van Alphen effect
The de Haas–van Alphen effect is a quantum oscillatory phenomenon in metals where the magnetization varies periodically with applied magnetic field, allowing precise mapping of the electronic structure and Fermi surface.
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E.
Bardeen–Stephen model of flux flow in superconductors
The Bardeen–Stephen model of flux flow in superconductors is a theoretical framework that describes how magnetic vortices move and dissipate energy in type-II superconductors under applied currents and fields.
- F. None of above. chosen
- G. Unsure - the case is ambiguous/there is not enough information to decide.
NED2
Entity disambiguation (via description)
gpt-5-mini-2025-08-07
Target entity: Josephson effect Target entity description: The Josephson effect is a quantum mechanical phenomenon in which a supercurrent flows between two superconductors separated by a thin insulating barrier, enabling devices like SQUIDs and superconducting qubits.
-
A.
Meissner effect
The Meissner effect is the phenomenon in which a superconductor expels magnetic fields from its interior when cooled below its critical temperature, leading to perfect diamagnetism.
-
B.
Josephson constant
The Josephson constant is a fundamental physical constant that relates frequency to voltage in superconducting Josephson junctions and underpins the quantum standard of voltage.
-
C.
BCS theory of superconductivity
The BCS theory of superconductivity is a fundamental microscopic theory that explains superconductivity through the formation of Cooper pairs of electrons and their collective quantum behavior in a solid.
-
D.
de Haas–van Alphen effect
The de Haas–van Alphen effect is a quantum oscillatory phenomenon in metals where the magnetization varies periodically with applied magnetic field, allowing precise mapping of the electronic structure and Fermi surface.
-
E.
Bardeen–Stephen model of flux flow in superconductors
The Bardeen–Stephen model of flux flow in superconductors is a theoretical framework that describes how magnetic vortices move and dissipate energy in type-II superconductors under applied currents and fields.
- F. None of above. chosen
Statements (48)
| Predicate | Object |
|---|---|
| instanceOf |
quantum mechanical phenomenon
ⓘ
superconductivity phenomenon ⓘ |
| dependsOn |
macroscopic quantum phase coherence
ⓘ
superconducting energy gap ⓘ |
| describedIn |
Ginzburg–Landau theory
NERFINISHED
ⓘ
microscopic tunneling models ⓘ |
| discoveredBy | Brian David Josephson NERFINISHED ⓘ |
| enablesMeasurementOf |
fundamental constants
ⓘ
magnetic flux ⓘ |
| governedBy |
Josephson relations
NERFINISHED
ⓘ
phase difference of superconducting order parameter ⓘ |
| hasApplication |
metrological voltage standards
ⓘ
microwave detection ⓘ ultra-sensitive magnetometry ⓘ |
| hasConsequence |
oscillating supercurrent at finite voltage
ⓘ
supercurrent at zero voltage ⓘ |
| hasDiscoveryYear | 1962 ⓘ |
| hasImpactOn |
development of quantum information processing
ⓘ
precision electrical metrology ⓘ |
| hasKeyQuantity |
Josephson frequency
ⓘ
critical current ⓘ phase difference ⓘ |
| hasType |
AC Josephson effect
NERFINISHED
ⓘ
DC Josephson effect NERFINISHED ⓘ |
| involves |
Cooper pairs
ⓘ
supercurrent ⓘ |
| namedAfter | Brian David Josephson NERFINISHED ⓘ |
| occursBetween | two superconductors ⓘ |
| occursInDevice |
SIS junction
ⓘ
SNS junction NERFINISHED ⓘ tunnel junction ⓘ weak-link bridge ⓘ |
| relatedTo |
BCS theory
NERFINISHED
ⓘ
quantum tunneling ⓘ superconducting phase difference ⓘ |
| requires |
superconducting electrodes
ⓘ
weak link ⓘ |
| requiresCondition | temperature below superconducting critical temperature ⓘ |
| separatedBy | thin insulating barrier ⓘ |
| standardizedBy | Josephson constant NERFINISHED ⓘ |
| temperatureDependence | critical current decreases with temperature ⓘ |
| usedIn |
Josephson junction
NERFINISHED
ⓘ
SQUID NERFINISHED ⓘ quantum computing ⓘ superconducting electronics ⓘ superconducting quantum interference device ⓘ superconducting qubit ⓘ voltage standard ⓘ |
How these facts were elicited
The pipeline generated the facts above by prompting gpt-5.1 with this entity's name + description and the instruction below.
Instruction
You are a knowledge base construction expert. Given a subject entity and a description of it, return factual statements that you know for the subject as a JSON list of dictionaries(triples), where keys must be "subject", "predicate" and "object". The number of facts may be very high, between 25 to 50 or more, for very popular subjects. For less popular subjects, the number of facts can be very low, like 5 or 10. # Requirements - If you don't know the subject at all, return an empty list. - If the subject is not a named entity, return an empty list. - Include at least one triple where predicate is "instanceOf". - Do not get too wordy. - Separate several objects into multiple triples with one object.
Input
Subject: Josephson effect Description of subject: The Josephson effect is a quantum mechanical phenomenon in which a supercurrent flows between two superconductors separated by a thin insulating barrier, enabling devices like SQUIDs and superconducting qubits.
Referenced by (5)
Full triples — surface form annotated when it differs from this entity's canonical label.
this entity surface form:
DC Josephson effect