Larmor precession
E232901
Larmor precession is the precession of the magnetic moments of charged particles or nuclei in an external magnetic field at a characteristic angular frequency proportional to the field strength.
All labels observed (2)
| Label | Occurrences |
|---|---|
| Larmor precession canonical | 6 |
| Larmor frequency | 5 |
How this entity was disambiguated
This entity first appeared as the object of triple T2092613 — 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: Larmor precession Context triple: [Zeeman effect, relatedTo, Larmor precession]
-
A.
Bohr magneton
The Bohr magneton is a fundamental physical constant that represents the natural unit of the electron’s magnetic moment in atomic physics.
-
B.
Bloch equations
The Bloch equations are a set of differential equations in nuclear magnetic resonance and quantum mechanics that describe the time evolution of nuclear magnetization in an external magnetic field.
-
C.
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.
-
D.
Zeeman effect
The Zeeman effect is the splitting of atomic or molecular spectral lines into multiple components when subjected to an external magnetic field, revealing information about energy levels and magnetic moments.
-
E.
Pauli equation
The Pauli equation is a non-relativistic quantum mechanical wave equation that extends the Schrödinger equation to include spin-½ particles interacting with electromagnetic 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: Larmor precession Target entity description: Larmor precession is the precession of the magnetic moments of charged particles or nuclei in an external magnetic field at a characteristic angular frequency proportional to the field strength.
-
A.
Bohr magneton
The Bohr magneton is a fundamental physical constant that represents the natural unit of the electron’s magnetic moment in atomic physics.
-
B.
Bloch equations
The Bloch equations are a set of differential equations in nuclear magnetic resonance and quantum mechanics that describe the time evolution of nuclear magnetization in an external magnetic field.
-
C.
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.
-
D.
Zeeman effect
The Zeeman effect is the splitting of atomic or molecular spectral lines into multiple components when subjected to an external magnetic field, revealing information about energy levels and magnetic moments.
-
E.
Pauli equation
The Pauli equation is a non-relativistic quantum mechanical wave equation that extends the Schrödinger equation to include spin-½ particles interacting with electromagnetic fields.
- F. None of above. chosen
Statements (50)
| Predicate | Object |
|---|---|
| instanceOf |
magnetic resonance concept
ⓘ
physical phenomenon ⓘ |
| appliesTo |
atomic nuclei
ⓘ
charged particles ⓘ electrons ⓘ |
| assumes | static and uniform magnetic field in simplest form ⓘ |
| causes | time evolution of spin orientation ⓘ |
| dependsOn |
gyromagnetic ratio of the particle
ⓘ
local magnetic field ⓘ |
| describedIn |
classical mechanics
ⓘ
quantum mechanics ⓘ |
| fieldOfStudy |
atomic physics
ⓘ
condensed matter physics ⓘ medical imaging ⓘ nuclear physics ⓘ |
| frequencyProportionalTo | magnetic field strength ⓘ |
| governedBy | torque on a magnetic dipole in a magnetic field ⓘ |
| hasApproximation | Larmor theorem in classical electrodynamics ⓘ |
| hasCharacteristic | occurs at a characteristic angular frequency proportional to magnetic field strength ⓘ |
| hasDefinition | precession of the magnetic moments of charged particles or nuclei in an external magnetic field ⓘ |
| hasDirection | about the direction of the external magnetic field ⓘ |
| hasFormula |
ω = γ B
ⓘ
ω = −γ B for sign convention including gyromagnetic ratio sign ⓘ |
| hasParameter |
B (magnetic field magnitude)
ⓘ
γ (gyromagnetic ratio) ⓘ ω (Larmor angular frequency) ⓘ |
| hasProperty | is coherent for an ensemble of identical spins in a uniform field ⓘ |
| hasQuantity |
Larmor angular frequency
ⓘ
Larmor frequency ⓘ
linked to:
Larmor precession
|
| hasUnit |
hertz for precession frequency
ⓘ
radians per second for angular frequency ⓘ |
| involves |
magnetic moment
ⓘ
orbital angular momentum ⓘ spin angular momentum ⓘ |
| modeledBy | Bloch equations ⓘ |
| namedAfter | Joseph Larmor ⓘ |
| occursIn | external magnetic field ⓘ |
| occursWhen | a magnetic moment is not aligned with the external magnetic field ⓘ |
| relatedConcept |
Bloch sphere representation
ⓘ
linked to:
Poincaré sphere
gyromagnetic ratio ⓘ magnetic dipole moment ⓘ spin precession ⓘ |
| relatedTo | Zeeman effect ⓘ |
| underlies |
electron spin resonance
ⓘ
magnetic resonance imaging ⓘ nuclear magnetic resonance ⓘ |
| usedIn |
atomic clocks based on magnetic resonance
ⓘ
precision magnetometry ⓘ quantum information processing with spins ⓘ spintronics ⓘ |
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: Larmor precession Description of subject: Larmor precession is the precession of the magnetic moments of charged particles or nuclei in an external magnetic field at a characteristic angular frequency proportional to the field strength.
Referenced by (11)
Full triples — surface form annotated when it differs from this entity's canonical label.
linked to: Larmor precession
linked to: Larmor precession
subject linked to:
Larmor
subject linked to:
Larmor
linked to: Larmor precession
subject linked to:
Larmor theorem in classical electrodynamics
subject linked to:
Larmor theorem in classical electrodynamics
linked to: Larmor precession
subject linked to:
Larmor theorem in classical electrodynamics
subject linked to:
Larmor theorem in classical electrodynamics
linked to: Larmor precession