Heaviside–Lorentz units
E102893
Heaviside–Lorentz units are a rationalized system of electromagnetic units commonly used in theoretical physics, especially in relativistic formulations of Maxwell’s equations and quantum field theory.
All labels observed (2)
| Label | Occurrences |
|---|---|
| Heaviside–Lorentz units canonical | 3 |
| Lorentz–Heaviside natural units | 1 |
How this entity was disambiguated
This entity first appeared as the object of triple T880723 — 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: Heaviside–Lorentz units Context triple: [Oliver Heaviside, knownFor, Heaviside–Lorentz units]
-
A.
Gaussian units
Gaussian units are a cgs-based system of electromagnetic units widely used in theoretical physics, especially in electrodynamics, for their mathematical simplicity and symmetry.
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B.
Lorentz
Lorentz is a Dutch surname most famously associated with physicist Hendrik Lorentz, a pioneer of electromagnetic theory and relativity.
-
C.
Maxwell's equations
Maxwell's equations are the fundamental set of four equations in classical electromagnetism that describe how electric and magnetic fields are generated and interact with charges and currents.
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D.
International System of Units
The International System of Units is the globally accepted standard for measurement, defining a coherent set of base and derived units used in science, industry, and everyday life.
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E.
Lorentz force
The Lorentz force is the fundamental force experienced by a charged particle moving in electric and magnetic fields, forming the basis of classical electromagnetism.
- 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: Heaviside–Lorentz units Target entity description: Heaviside–Lorentz units are a rationalized system of electromagnetic units commonly used in theoretical physics, especially in relativistic formulations of Maxwell’s equations and quantum field theory.
-
A.
Gaussian units
Gaussian units are a cgs-based system of electromagnetic units widely used in theoretical physics, especially in electrodynamics, for their mathematical simplicity and symmetry.
-
B.
Lorentz
Lorentz is a Dutch surname most famously associated with physicist Hendrik Lorentz, a pioneer of electromagnetic theory and relativity.
-
C.
Maxwell's equations
Maxwell's equations are the fundamental set of four equations in classical electromagnetism that describe how electric and magnetic fields are generated and interact with charges and currents.
-
D.
International System of Units
The International System of Units is the globally accepted standard for measurement, defining a coherent set of base and derived units used in science, industry, and everyday life.
-
E.
Lorentz force
The Lorentz force is the fundamental force experienced by a charged particle moving in electric and magnetic fields, forming the basis of classical electromagnetism.
- F. None of above. chosen
Statements (48)
| Predicate | Object |
|---|---|
| instanceOf |
Gaussian-like unit system
ⓘ
electromagnetic unit system ⓘ rationalized unit system ⓘ |
| advantage |
convenient for perturbative calculations in quantum electrodynamics
ⓘ
reduces proliferation of 4π factors in field equations ⓘ simplifies covariant tensor formulation of electromagnetism ⓘ |
| appliesTo |
classical electromagnetism
ⓘ
quantum electrodynamics Lagrangian density ⓘ |
| category | systems of units in electromagnetism ⓘ |
| contrastWith |
Gaussian units
ⓘ
International System of Units ⓘ
surface form:
SI units
cgs-EMU units ⓘ cgs-ESU units ⓘ |
| feature |
Coulomb’s law has 1∕(4πr²) factor for the electric field of a point charge
ⓘ
Maxwell’s equations take a particularly simple symmetric form in vacuum ⓘ charge has different dimensions than in SI units ⓘ electric and magnetic fields have the same units ⓘ eliminates factors of 4π from Maxwell’s equations in vacuum ⓘ natural for relativistic notation with four-vectors and tensors ⓘ often combined with natural units where c = 1 and ℏ = 1 ⓘ often used in high-energy physics literature ⓘ often used in quantum field theory textbooks ⓘ symmetric treatment of electric and magnetic fields ⓘ uses cgs-based dimensions for electromagnetic quantities ⓘ vacuum permeability μ0 is dimensionless and equal to 1 ⓘ vacuum permittivity ε0 is dimensionless and equal to 1 ⓘ |
| field |
electromagnetism
ⓘ
quantum field theory ⓘ relativistic electrodynamics ⓘ theoretical physics ⓘ |
| hasBaseSystem | centimetre–gram–second system ⓘ |
| namedAfter |
Hendrik Lorentz
ⓘ
Oliver Heaviside ⓘ |
| rationalizationOf | Gaussian units ⓘ |
| rationalized | true ⓘ |
| relatedConcept |
Heaviside–Lorentz units
self-linksurface differs
ⓘ
surface form:
Lorentz–Heaviside natural units
Planck units ⓘ natural units ⓘ |
| typicalConvention |
reduced Planck constant ℏ often set to 1
ⓘ
speed of light c often set to 1 ⓘ |
| usedBy |
high-energy physicists
ⓘ
quantum field theorists ⓘ theoretical physicists ⓘ |
| usedIn |
classical field theory
ⓘ
high-energy physics ⓘ particle physics ⓘ quantum electrodynamics ⓘ relativistic formulation of Maxwell’s equations ⓘ |
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: Heaviside–Lorentz units Description of subject: Heaviside–Lorentz units are a rationalized system of electromagnetic units commonly used in theoretical physics, especially in relativistic formulations of Maxwell’s equations and quantum field theory.
Referenced by (4)
Full triples — surface form annotated when it differs from this entity's canonical label.
this entity surface form:
Lorentz–Heaviside natural units