Pippard nonlocal theory
E48483
Pippard nonlocal theory is a refinement of superconductivity theory that introduces spatially nonlocal relations between current and electromagnetic fields to account for finite coherence length effects beyond the London model.
All labels observed (2)
| Label | Occurrences |
|---|---|
| Pippard coherence length | 1 |
| Pippard nonlocal theory canonical | 1 |
How this entity was disambiguated
This entity first appeared as the object of triple T380154 — 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: Pippard nonlocal theory Context triple: [London equations, extendedBy, Pippard nonlocal theory]
-
A.
Ginzburg–Landau theory of superconductivity
The Ginzburg–Landau theory of superconductivity is a phenomenological framework that describes superconductors using a complex order parameter and macroscopic equations to capture phase transitions, coherence length, and magnetic behavior.
-
B.
Eliashberg theory
Eliashberg theory is an extension of BCS superconductivity that incorporates strong-coupling and frequency-dependent effects to more accurately describe real superconducting materials.
-
C.
London equations
The London equations are fundamental relations in superconductivity that describe how magnetic fields behave inside superconductors, capturing key features like the Meissner effect and zero electrical resistance.
-
D.
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.
-
E.
Fresnel diffraction theory
Fresnel diffraction theory is a wave-optics framework that describes how light diffracts when source or observation distances are finite, using near-field approximations derived from the Huygens–Fresnel principle.
- 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: Pippard nonlocal theory Target entity description: Pippard nonlocal theory is a refinement of superconductivity theory that introduces spatially nonlocal relations between current and electromagnetic fields to account for finite coherence length effects beyond the London model.
-
A.
Ginzburg–Landau theory of superconductivity
The Ginzburg–Landau theory of superconductivity is a phenomenological framework that describes superconductors using a complex order parameter and macroscopic equations to capture phase transitions, coherence length, and magnetic behavior.
-
B.
Eliashberg theory
Eliashberg theory is an extension of BCS superconductivity that incorporates strong-coupling and frequency-dependent effects to more accurately describe real superconducting materials.
-
C.
London equations
The London equations are fundamental relations in superconductivity that describe how magnetic fields behave inside superconductors, capturing key features like the Meissner effect and zero electrical resistance.
-
D.
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.
-
E.
Fresnel diffraction theory
Fresnel diffraction theory is a wave-optics framework that describes how light diffracts when source or observation distances are finite, using near-field approximations derived from the Huygens–Fresnel principle.
- F. None of above. chosen
Statements (30)
| Predicate | Object |
|---|---|
| instanceOf |
nonlocal electrodynamics theory
ⓘ
theory of superconductivity ⓘ |
| accountsFor |
deviation from local London electrodynamics
ⓘ
finite coherence length in superconductors ⓘ |
| addresses | breakdown of local London theory when mean free path is large ⓘ |
| appliesTo |
clean superconductors
ⓘ
type-I superconductors ⓘ |
| basedOn | BCS microscopic picture of Cooper pairs ⓘ |
| characterizedBy | Pippard coherence length ⓘ |
| contrastsWith | local London electrodynamics ⓘ |
| extends | London local relation j ∝ A to a spatial integral over A ⓘ |
| field |
condensed matter physics
ⓘ
superconductivity ⓘ |
| influenced | development of microscopic theories of superconducting electrodynamics ⓘ |
| introduces |
nonlocal relation between supercurrent and electromagnetic field
ⓘ
spatially nonlocal relation between current density and vector potential ⓘ |
| namedAfter | A. B. Pippard ⓘ |
| precedes | full microscopic BCS electrodynamics ⓘ |
| predicts |
modification of penetration depth in clean limit
ⓘ
nonlocal electromagnetic response in superconductors ⓘ |
| refines |
London equations
ⓘ
London theory of superconductivity ⓘ |
| relatedTo |
BCS theory of superconductivity
ⓘ
surface form:
BCS theory
Ginzburg–Landau theory of superconductivity ⓘ
surface form:
Ginzburg–Landau theory
London penetration depth ⓘ coherence length ⓘ |
| usedIn |
analysis of electromagnetic response of clean superconductors
ⓘ
interpretation of nonlocal effects in penetration depth measurements ⓘ |
| uses | integral kernel relating current to vector potential ⓘ |
| validWhen | electron mean free path is comparable to or larger than coherence length ⓘ |
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: Pippard nonlocal theory Description of subject: Pippard nonlocal theory is a refinement of superconductivity theory that introduces spatially nonlocal relations between current and electromagnetic fields to account for finite coherence length effects beyond the London model.
Referenced by (2)
Full triples — surface form annotated when it differs from this entity's canonical label.
this entity surface form:
Pippard coherence length