Topology & Physics: Motivation & Applications

  • Context: Graduate 
  • Thread starter Thread starter quasar987
  • Start date Start date
  • Tags Tags
    Physics Topology
Click For Summary

Discussion Overview

The discussion centers around the motivation for physicists to learn topology, its applications in various fields of physics, and the insights topology may provide into physical concepts, particularly in relation to the shape of spacetime and global properties of physical systems.

Discussion Character

  • Exploratory
  • Technical explanation
  • Conceptual clarification
  • Debate/contested

Main Points Raised

  • Some participants suggest that topology is relevant in fields such as magnetic confinement in fusion experiments and the study of spacetime geometry.
  • One participant expresses uncertainty about the role of topology versus differential geometry in understanding spacetime, seeking confirmation from others.
  • Another participant asserts that topology is crucial for understanding global properties of spacetime, citing notable physicists who have utilized topological concepts.
  • A participant introduces the idea of parallel transport and Berry's phase as applications of topology in physics, while acknowledging a lack of formal training in the subject.
  • One contributor describes topology as dealing with fundamental concepts of connectivity within sets, emphasizing its focus on global properties rather than local behaviors.
  • Another participant notes the challenges of understanding differential topology due to its minimal assumptions and the difficulty in demonstrating results.

Areas of Agreement / Disagreement

Participants express a range of views on the significance of topology in physics, with some agreeing on its importance for global properties of spacetime while others remain uncertain about its distinction from differential geometry. The discussion does not reach a consensus on the extent of topology's applications or its foundational role in physics.

Contextual Notes

The discussion highlights limitations in participants' mathematical backgrounds and varying levels of familiarity with topology, which may affect their interpretations and contributions.

quasar987
Science Advisor
Homework Helper
Gold Member
Messages
4,796
Reaction score
32
What is the motivation for a physicist to learn topology?

Are there fields of physics that make explicit use of the concept of topology? (which ones)

Do the ideas of topology give any insights into any topic of physics?

etc.
 
Physics news on Phys.org
My math education is essentially non-existent, and topology is a branch of math, but one application that I know of is in such fields as magnetic confinement for fusion experiments (Tokomak type reactors).
It also comes into play when trying to determine the shape of space-time, but that is so far beyond me that I'll leave SpaceTiger to clear it up.
 
I was under the impression that only differential geometry was involved in calculating the shape of space time. Can anyone confirm what Danger said?
 
quasar987 said:
I was under the impression that only differential geometry was involved in calculating the shape of space time. Can anyone confirm what Danger said?

Danger is right - topology is important for global properties of spacetime.

Penrose, Hawking, Geroch and made tremendous use of topological concepts in their work on spacetime.

Any differential manifold is also a topological manifold.

Einstein's equation is a local equation, which doesn't completely the global properties of spacetime. For example, is spacetime simply connected or multiply connected? There have been searches for mutiply connectness, but so far no evidence for this has been found.
 
quasar987 said:
What is the motivation for a physicist to learn topology?

Are there fields of physics that make explicit use of the concept of topology? (which ones)

Do the ideas of topology give any insights into any topic of physics?

etc.
This intervention is not a professional one and many other people could give a better answer to your question than me. But if you think to the notion of parallel transport and to its consequence, the Berry's phase for example, you get a first concrete application of the indirect effect of the topology on physical phenomenon. In my non-specialist mind, geometry and topology are notions very closed together even if any specialist will immediately contradicts my point of view. Hope I could help you!
 
I've never got the hang on topology, but i have tried many times lol. Topology actually speaks about very fundamental concepts.It mainly speaks about sets. It treats on how things in a set are connected to each other, no mather how you deform it. Sometimes people speaks about topology as "rubber physics". The role of topology in physics is to make assesments on global properties of systems. Most of what is taught in university speaks of local properties, equations are studied in the neighbourhood of... and stuff like that. To give an example, relativity teaches us that space-time is LOCALLY minkowskian, but it's global structure can't be directly extracted from the behaviour of the equations in a neighbourhood of a point. Differential topology deals with such matters. It is not an easy branch, at least for me, because it makes so little assumptions that demonstrating anything is very difficult
 

Similar threads

  • · Replies 6 ·
Replies
6
Views
2K
  • · Replies 9 ·
Replies
9
Views
3K
  • · Replies 4 ·
Replies
4
Views
3K
  • · Replies 2 ·
Replies
2
Views
1K
  • · Replies 14 ·
Replies
14
Views
2K
  • · Replies 5 ·
Replies
5
Views
1K
  • · Replies 18 ·
Replies
18
Views
10K
  • · Replies 31 ·
2
Replies
31
Views
1K
  • · Replies 5 ·
Replies
5
Views
2K
  • · Replies 30 ·
2
Replies
30
Views
10K