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Research draft

magnetic monopole

vr.tr.magnetic-monopole · PHY.PLC

Let an agent explain magnetic monopoles, relay theory, predictions, searches and emergent analogues from physics sources with experimental status attributed, describe the named monopole solutions, and distinguish magnetic monopoles from ordinary magnets, magnetic dipoles, emergent quasi-particles and unconfirmed candidate detections.

Thing Registry Physical world and living systems

Research draft, second pass

A second pass drafted this model: the structure a model of this thing needs, and what is known about it in the world. The line under this one says how the second half was obtained - researched against sources, or recalled without web access, in which case nothing here was read anywhere and every claim is a lead to verify. Unreviewed either way.

written by Claude from model knowledge without web access - no source was read, every claim is a lead to verify

Researched by: Claude

Purpose and description

Let an agent explain magnetic monopoles, relay theory, predictions, searches and emergent analogues from physics sources with experimental status attributed, describe the named monopole solutions, and distinguish magnetic monopoles from ordinary magnets, magnetic dipoles, emergent quasi-particles and unconfirmed candidate detections.

A hypothetical elementary particle carrying an isolated magnetic charge, a north or south pole alone, proposed in quantum theory by Paul Dirac in 1931, who showed its existence would explain the quantisation of electric charge, and predicted as solitons in grand unified theories, such as the t Hooft-Polyakov monopole of 1974, with the Wu-Yang monopole of 1975 giving a geometric description; no free magnetic monopole has been confirmed despite searches such as the MoEDAL experiment at CERN, while quasi-particles behaving like monopoles have been observed in materials such as spin ice.

What it is for: Not applicable; a hypothetical particle.

It can be explain theory and predictions; relay searches with attribution; describe named solutions; distinguish related phenomena.

Distinguishing features

Isolated magnetic charge

Explains charge quantisation

Predicted by GUTs

Not yet confirmed

What it looks like

Not observed as a free particle; represented in equations and detector searches.

Physical character

Dirac proposal: 1931 year

t Hooft-Polyakov monopole: 1974 year

spin ice monopole observations: 2009 year - emergent quasi-particles

How it is recognised

Hypothetical isolated magnetic charge

Dirac monopole, Wu-Yang monopole, t Hooft-Polyakov monopole

Ordinary magnets always have two poles; dipoles pair charges; spin ice monopoles are emergent quasi-particles; the 1982 Cabrera event was not confirmed

Related models

is a kind of - in registry terms

hypothetical particle

is predicted by -

grand unified theory

is searched for by -

MoEDAL experiment

is contrasted with -

magnetic dipole

In practice

Families and kinds

Dirac monopoles

topological GUT monopoles

Wu-Yang formulation

emergent monopoles in condensed matter

Standards and regulation

No regulation

Failure modes and hazards

Presenting monopoles as discovered

Confusing emergent and elementary monopoles

Pseudoscientific magnet claims

Also called

Wu–Yang monopole't Hooft–Polyakov monopole

Where this came from

wikidata · CC0 1.0

Source repository Registry entry point

Drafted structure

Bundle to layer to finding to question, as the second pass will find it: 4 bundles · 8 layers · 8 findings · 16 questions.

Understand What a magnetic monopole is.

Science.

Definition

Definition.

Definition

Definition.

  1. What is a magnetic monopole, and how does it differ from ordinary magnets, dipoles, emergent quasi-particles and unconfirmed detections? definition
  2. Is the question about theory, experiments, materials science or a product claim? boundary

Solutions

Named solutions.

Solutions

Solutions.

  1. What are the Dirac, Wu-Yang and t Hooft-Polyakov monopoles? definition
  2. Which entry fits the specific solution? action
Theory Theory.

Science.

Dirac

Charge quantisation.

Dirac

Dirac.

  1. How did Dirac link monopoles to the quantisation of electric charge? provenance
  2. Which references are standard? provenance

GUTs

Grand unified theories.

GUTs

GUTs.

  1. Why do grand unified theories predict very heavy monopoles, and what is the monopole problem in cosmology? provenance
  2. Which sources are cited? provenance
Experiment Searches.

Attribution.

Searches

Experimental searches.

Searches

Searches.

  1. What have MoEDAL, IceCube and earlier searches found, with limits attributed? provenance
  2. Which entry fits MoEDAL experiment? action

Cabrera event

Candidate events.

Cabrera event

Cabrera event.

  1. What was the 1982 Cabrera candidate event, and why is it not accepted as a discovery? provenance
  2. Is the presentation neutral and attributed? boundary
Context Materials and cosmology.

Context.

Spin ice

Emergent monopoles.

Spin ice

Spin ice.

  1. How do spin ice materials host monopole-like excitations? provenance
  2. Which entry fits spin ice? action

Cosmology

Monopole problem.

Cosmology

Cosmology.

  1. How did inflation address the cosmological monopole problem? provenance
  2. Which entry fits inflation (cosmology)? action

What the second pass must settle

  • Should the named monopole solutions be separate entries?
  • How should search results be kept current?
  • Should emergent monopoles be a separate entry?
Draft as JSON