Plebański action for gravity
E811627
first-order formulation of gravity
gravitational action principle
reformulation of general relativity
self-dual formulation of gravity
The Plebański action for gravity is a reformulation of general relativity that expresses the gravitational field in terms of self-dual two-forms and connections, forming the basis for several modern approaches to quantum gravity.
All labels observed (1)
| Label | Occurrences |
|---|---|
| Plebański action for gravity canonical | 1 |
How this entity was disambiguated
This entity first appeared as the object of triple T9637313 — 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: Plebański action for gravity Context triple: [Jerzy Plebański, hasConcept, Plebański action for gravity]
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A.
Einstein–Hilbert action
The Einstein–Hilbert action is the fundamental action in general relativity whose variation yields Einstein’s field equations, expressing gravity as the dynamics of spacetime curvature.
-
B.
Brans–Dicke theory
Brans–Dicke theory is an alternative theory of gravitation to Einstein’s general relativity that introduces a scalar field to allow for a varying gravitational “constant.”
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C.
f(R) gravity
f(R) gravity is a class of modified theories of gravity in which the Einstein–Hilbert action is generalized by replacing the Ricci scalar R with a function f(R), leading to alternative explanations for cosmic acceleration and gravitational phenomena.
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D.
Polyakov action in string theory
The Polyakov action in string theory is a reformulation of the string’s dynamics that treats the worldsheet metric as an independent field, providing a convenient starting point for quantizing strings and analyzing their conformal symmetry.
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E.
Nordström's scalar theory of gravitation
Nordström's scalar theory of gravitation is an early 20th-century relativistic theory of gravity that models gravitational interaction using a scalar field, serving as a precursor and alternative to Einstein’s general relativity.
- 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: Plebański action for gravity Target entity description: The Plebański action for gravity is a reformulation of general relativity that expresses the gravitational field in terms of self-dual two-forms and connections, forming the basis for several modern approaches to quantum gravity.
-
A.
Einstein–Hilbert action
The Einstein–Hilbert action is the fundamental action in general relativity whose variation yields Einstein’s field equations, expressing gravity as the dynamics of spacetime curvature.
-
B.
Brans–Dicke theory
Brans–Dicke theory is an alternative theory of gravitation to Einstein’s general relativity that introduces a scalar field to allow for a varying gravitational “constant.”
-
C.
f(R) gravity
f(R) gravity is a class of modified theories of gravity in which the Einstein–Hilbert action is generalized by replacing the Ricci scalar R with a function f(R), leading to alternative explanations for cosmic acceleration and gravitational phenomena.
-
D.
Polyakov action in string theory
The Polyakov action in string theory is a reformulation of the string’s dynamics that treats the worldsheet metric as an independent field, providing a convenient starting point for quantizing strings and analyzing their conformal symmetry.
-
E.
Nordström's scalar theory of gravitation
Nordström's scalar theory of gravitation is an early 20th-century relativistic theory of gravity that models gravitational interaction using a scalar field, serving as a precursor and alternative to Einstein’s general relativity.
- F. None of above. chosen
Statements (49)
| Predicate | Object |
|---|---|
| instanceOf |
first-order formulation of gravity
ⓘ
gravitational action principle ⓘ reformulation of general relativity ⓘ self-dual formulation of gravity ⓘ |
| aimsTo |
provide a background-independent starting point for quantization
ⓘ
simplify the canonical formulation of general relativity ⓘ |
| appliesTo |
Lorentzian signature metrics
ⓘ
Riemannian signature metrics ⓘ |
| coreIdea |
fundamental variables are two-forms and connections instead of the metric
ⓘ
gravity as a constrained BF theory ⓘ imposition of simplicity constraints recovers general relativity ⓘ |
| describes | Einstein’s theory of gravity ⓘ |
| equivalentTo |
Einstein–Hilbert action (on shell)
NERFINISHED
ⓘ
Palatini action (on shell) NERFINISHED ⓘ tetrad formulation of general relativity (on shell) ⓘ |
| field |
classical general relativity
ⓘ
quantum gravity ⓘ theoretical physics ⓘ |
| formulatedIn | four spacetime dimensions ⓘ |
| generalizationOf | pure BF theory with constraints ⓘ |
| hasVariant |
Holst-modified Plebański action
NERFINISHED
ⓘ
Plebański action with cosmological constant NERFINISHED ⓘ chiral (self-dual) Plebański action NERFINISHED ⓘ non-chiral Plebański action NERFINISHED ⓘ |
| historicalContext | developed in the 1970s ⓘ |
| includesTerm | cosmological constant term in some formulations ⓘ |
| inspired |
constrained BF approaches to quantum gravity
ⓘ
spin foam quantization of gravity ⓘ |
| involves |
Lagrange multipliers enforcing constraints
ⓘ
complex variables in Lorentzian signature ⓘ self-dual part of the curvature ⓘ |
| mathematicalStructure |
gauge-theoretic formulation of gravity
ⓘ
uses differential forms and exterior calculus ⓘ |
| namedAfter | Jerzy Plebański NERFINISHED ⓘ |
| relatedTo |
Ashtekar variables
NERFINISHED
ⓘ
Barrett–Crane model NERFINISHED ⓘ EPRL–FK spin foam models NERFINISHED ⓘ loop quantum gravity NERFINISHED ⓘ self-dual Ashtekar connection NERFINISHED ⓘ spin foam models ⓘ |
| usedIn |
covariant approaches to quantum gravity
ⓘ
path-integral formulations of gravity ⓘ |
| usesConcept |
BF theory
NERFINISHED
ⓘ
SU(2) connection ⓘ connection one-forms ⓘ self-dual part of the spin connection ⓘ self-dual two-forms ⓘ simplicity constraints ⓘ tetrad formalism ⓘ |
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: Plebański action for gravity Description of subject: The Plebański action for gravity is a reformulation of general relativity that expresses the gravitational field in terms of self-dual two-forms and connections, forming the basis for several modern approaches to quantum gravity.
Referenced by (1)
Full triples — surface form annotated when it differs from this entity's canonical label.