H-theorem
E57430
The H-theorem is Boltzmann’s foundational result in statistical mechanics that explains the irreversible increase of entropy in a gas from time-reversible microscopic dynamics, providing a key link between mechanics and the second law of thermodynamics.
All labels observed (4)
| Label | Occurrences |
|---|---|
| H-theorem canonical | 4 |
| Boltzmann H-theorem | 2 |
| Loschmidt paradox | 2 |
| Boltzmann’s H-theorem | 1 |
How this entity was disambiguated
This entity first appeared as the object of triple T462048 — 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.
Target entity: H-theorem Context triple: [Ludwig Boltzmann, notableIdea, H-theorem]
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A.
Bekenstein–Hawking entropy
Bekenstein–Hawking entropy is the thermodynamic entropy associated with a black hole, proportional to the area of its event horizon and fundamental in linking gravity, quantum theory, and thermodynamics.
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B.
Feynman–Hellmann theorem
The Feynman–Hellmann theorem is a result in quantum mechanics that relates the derivative of an energy eigenvalue with respect to a parameter in the Hamiltonian to the expectation value of the corresponding derivative of the Hamiltonian.
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C.
Shannon–Khinchin axioms
The Shannon–Khinchin axioms are a set of fundamental conditions that uniquely characterize Shannon entropy as the standard measure of information and uncertainty in probability theory and information theory.
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D.
Bekenstein bound
The Bekenstein bound is a theoretical limit in physics on the maximum amount of information or entropy that can be contained within a finite region of space with a given amount of energy.
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E.
Noether's theorem
Noether's theorem is a fundamental result in theoretical physics and mathematics that links continuous symmetries of a physical system to corresponding conservation laws, such as energy or momentum conservation.
- F. None of above. chosen
- G. Unsure - the case is ambiguous/there is not enough information to decide.
Target entity: H-theorem Target entity description: The H-theorem is Boltzmann’s foundational result in statistical mechanics that explains the irreversible increase of entropy in a gas from time-reversible microscopic dynamics, providing a key link between mechanics and the second law of thermodynamics.
-
A.
Bekenstein–Hawking entropy
Bekenstein–Hawking entropy is the thermodynamic entropy associated with a black hole, proportional to the area of its event horizon and fundamental in linking gravity, quantum theory, and thermodynamics.
-
B.
Feynman–Hellmann theorem
The Feynman–Hellmann theorem is a result in quantum mechanics that relates the derivative of an energy eigenvalue with respect to a parameter in the Hamiltonian to the expectation value of the corresponding derivative of the Hamiltonian.
-
C.
Shannon–Khinchin axioms
The Shannon–Khinchin axioms are a set of fundamental conditions that uniquely characterize Shannon entropy as the standard measure of information and uncertainty in probability theory and information theory.
-
D.
Bekenstein bound
The Bekenstein bound is a theoretical limit in physics on the maximum amount of information or entropy that can be contained within a finite region of space with a given amount of energy.
-
E.
Noether's theorem
Noether's theorem is a fundamental result in theoretical physics and mathematics that links continuous symmetries of a physical system to corresponding conservation laws, such as energy or momentum conservation.
- F. None of above. chosen
Statements (48)
| Predicate | Object |
|---|---|
| instanceOf |
concept in thermodynamics
ⓘ
result in kinetic theory ⓘ theorem in statistical mechanics ⓘ |
| aimsToExplain | why macroscopic processes are time-asymmetric ⓘ |
| appliesTo |
dilute classical gas
ⓘ
non-equilibrium states near equilibrium ⓘ |
| associatedWith | Boltzmann equation for one-particle distribution function ⓘ |
| author | Ludwig Boltzmann ⓘ |
| basedOn |
classical mechanics
ⓘ
time-reversible microscopic dynamics ⓘ |
| connects | microscopic dynamics and macroscopic thermodynamic behavior ⓘ |
| describes | approach to equilibrium in a dilute gas ⓘ |
| explains |
entropy production in a dilute gas
ⓘ
macroscopic irreversibility from microscopic dynamics ⓘ |
| field |
kinetic theory of gases
ⓘ
statistical mechanics ⓘ thermodynamics ⓘ |
| hasConsequence |
Maxwell–Boltzmann statistics
ⓘ
surface form:
equilibrium Maxwell–Boltzmann distribution
|
| implies |
monotonic decrease of H-function over time
ⓘ
monotonic increase of entropy-like quantity ⓘ |
| influenced |
modern non-equilibrium statistical mechanics
ⓘ
philosophy of time’s arrow ⓘ |
| interpretation | entropy increase is overwhelmingly probable, not strictly necessary ⓘ |
| introducedIn | 1870s ⓘ |
| involves |
coarse-graining of microstates
ⓘ
collision term in Boltzmann equation ⓘ one-particle distribution function ⓘ |
| relatedConcept |
Boltzmann’s entropy formula S = k log W
ⓘ
Boltzmann–Gibbs entropy in statistical mechanics ⓘ
surface form:
Gibbs entropy
Poincaré recurrence theorem ⓘ coarse-grained entropy ⓘ ergodic hypothesis ⓘ |
| relatesTo |
Boltzmann entropy
ⓘ
Boltzmann equation ⓘ H-function ⓘ entropy increase ⓘ irreversibility ⓘ second law of thermodynamics ⓘ time-reversal invariance ⓘ |
| shows |
H-function is stationary at equilibrium
ⓘ
irreversible behavior emerges from probabilistic assumptions ⓘ |
| status | approximate result dependent on molecular chaos assumption ⓘ |
| subjectOf |
H-theorem
self-linksurface differs
ⓘ
surface form:
Loschmidt paradox
Zermelo recurrence objection ⓘ debates on foundations of statistical mechanics ⓘ |
| supports | statistical interpretation of the second law ⓘ |
| usesConcept |
Boltzmann equation
ⓘ
surface form:
Stosszahlansatz
molecular chaos assumption ⓘ |
How these facts were elicited
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Subject: H-theorem Description of subject: The H-theorem is Boltzmann’s foundational result in statistical mechanics that explains the irreversible increase of entropy in a gas from time-reversible microscopic dynamics, providing a key link between mechanics and the second law of thermodynamics.
Referenced by (9)
Full triples — surface form annotated when it differs from this entity's canonical label.