Aharonov–Casher effect
E435850
The Aharonov–Casher effect is a quantum mechanical phenomenon in which a neutral particle with a magnetic moment acquires a measurable phase shift when moving around a line of electric charge, illustrating the significance of electromagnetic potentials.
All labels observed (1)
| Label | Occurrences |
|---|---|
| Aharonov–Casher effect canonical | 2 |
How this entity was disambiguated
This entity first appeared as the object of triple T4388580 — 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: Aharonov–Casher effect Context triple: [Yakir Aharonov, notableConcept, Aharonov–Casher effect]
-
A.
Shubnikov–de Haas effect
The Shubnikov–de Haas effect is a quantum oscillatory phenomenon in the electrical resistance of conductors and semiconductors subjected to strong magnetic fields at low temperatures, used to probe their electronic structure and Fermi surface.
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B.
Kapitza–Dirac effect
The Kapitza–Dirac effect is a quantum phenomenon in which a beam of particles, such as electrons or atoms, is diffracted by a standing wave of light, demonstrating the wave-particle duality of matter.
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C.
de Haas–van Alphen effect
The de Haas–van Alphen effect is a quantum oscillatory phenomenon in metals where the magnetization varies periodically with applied magnetic field, allowing precise mapping of the electronic structure and Fermi surface.
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D.
Faraday effect
The Faraday effect is a magneto-optical phenomenon in which the polarization plane of light is rotated as it passes through a material under the influence of a magnetic field aligned with the direction of propagation.
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E.
Landau–Pomeranchuk–Migdal effect
The Landau–Pomeranchuk–Migdal effect is a quantum electrodynamics phenomenon in which high-energy electrons and photons in dense media experience suppressed bremsstrahlung and pair production due to multiple scattering.
- 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: Aharonov–Casher effect Target entity description: The Aharonov–Casher effect is a quantum mechanical phenomenon in which a neutral particle with a magnetic moment acquires a measurable phase shift when moving around a line of electric charge, illustrating the significance of electromagnetic potentials.
-
A.
Shubnikov–de Haas effect
The Shubnikov–de Haas effect is a quantum oscillatory phenomenon in the electrical resistance of conductors and semiconductors subjected to strong magnetic fields at low temperatures, used to probe their electronic structure and Fermi surface.
-
B.
Kapitza–Dirac effect
The Kapitza–Dirac effect is a quantum phenomenon in which a beam of particles, such as electrons or atoms, is diffracted by a standing wave of light, demonstrating the wave-particle duality of matter.
-
C.
de Haas–van Alphen effect
The de Haas–van Alphen effect is a quantum oscillatory phenomenon in metals where the magnetization varies periodically with applied magnetic field, allowing precise mapping of the electronic structure and Fermi surface.
-
D.
Faraday effect
The Faraday effect is a magneto-optical phenomenon in which the polarization plane of light is rotated as it passes through a material under the influence of a magnetic field aligned with the direction of propagation.
-
E.
Landau–Pomeranchuk–Migdal effect
The Landau–Pomeranchuk–Migdal effect is a quantum electrodynamics phenomenon in which high-energy electrons and photons in dense media experience suppressed bremsstrahlung and pair production due to multiple scattering.
- F. None of above. chosen
Statements (50)
| Predicate | Object |
|---|---|
| instanceOf |
physical phenomenon
ⓘ
quantum mechanical effect ⓘ topological phase effect ⓘ |
| appliesTo |
atoms with magnetic dipole moments
ⓘ
molecules with magnetic dipole moments ⓘ neutrons ⓘ spin-1/2 particles with magnetic moment ⓘ |
| dependsOn |
Planck constant
ⓘ
electric charge density of the line of charge ⓘ magnetic dipole moment of the particle ⓘ path of the particle around the line of charge ⓘ speed of light ⓘ |
| describes |
geometric phase acquired by a neutral particle
ⓘ
interaction between magnetic dipole and electric field ⓘ phase shift of a neutral particle with magnetic moment ⓘ |
| field |
electromagnetism
ⓘ
quantum field theory ⓘ quantum mechanics ⓘ quantum physics ⓘ |
| hasExperimentalVerification |
atomic interferometry experiments
ⓘ
neutron interferometry experiments ⓘ solid-state systems ⓘ |
| hasMathematicalDescription |
path integral formalism
ⓘ
phase factor in wavefunction ⓘ |
| hasTheoreticalBasis |
Dirac equation
ⓘ
relativistic quantum mechanics ⓘ |
| illustrates |
gauge invariance in quantum theory
ⓘ
nonlocal features of quantum mechanics ⓘ physical significance of electromagnetic potentials ⓘ |
| involves |
electric field
ⓘ
line of electric charge ⓘ magnetic dipole moment ⓘ neutral particle ⓘ quantum phase factor ⓘ topological phase ⓘ |
| isAnalogousTo | Aharonov–Bohm effect ⓘ |
| isDualTo | Aharonov–Bohm effect ⓘ |
| isIndependentOf | local classical forces on the particle ⓘ |
| isPredictedBy |
Aharon Casher
ⓘ
Yakir Aharonov ⓘ |
| occursWhen | neutral magnetic dipole encircles a line of electric charge ⓘ |
| phaseType |
geometric phase
ⓘ
topological phase ⓘ |
| relatedConcept |
Berry phase
ⓘ
geometric phase in quantum mechanics ⓘ spin–orbit interaction ⓘ topological quantum phases ⓘ |
| resultsIn |
measurable interference pattern shift
ⓘ
observable phase difference between quantum paths ⓘ |
| yearProposed | 1984 ⓘ |
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: Aharonov–Casher effect Description of subject: The Aharonov–Casher effect is a quantum mechanical phenomenon in which a neutral particle with a magnetic moment acquires a measurable phase shift when moving around a line of electric charge, illustrating the significance of electromagnetic potentials.
Referenced by (2)
Full triples — surface form annotated when it differs from this entity's canonical label.