Questions about Kaluza-Klein Theory

  • Thread starter lightfire
  • Start date
  • #1
8
0
I know this is technically not orthodox GR, but it is closely related. I was reading about Kaluza-Klein theory, but I don't completely understand it. Under what circumstances would could a gravitational field induce an electromagnetic field under this theory. Also, how is the Ricci tensor different?
 
Last edited:

Answers and Replies

  • #3
37,800
15,561
Under what circumstances would could a gravitational field induce an electromagnetic field under this theory.

Under the circumstance that the universe has five dimensions, not four, and the fifth dimension is curled up into a tiny circle at each point of what we call four-dimensional spacetime. Then the Einstein Field Equation for "gravity" in five dimensions can be split up into two pieces: one is the Einstein Field Equation for gravity in four dimensions; the other turns out to be Maxwell's Equations for electromagnetism in four dimensions.
 

Related Threads on Questions about Kaluza-Klein Theory

  • Last Post
Replies
6
Views
5K
Replies
1
Views
3K
  • Last Post
Replies
13
Views
5K
  • Last Post
Replies
3
Views
2K
  • Last Post
Replies
1
Views
2K
Replies
3
Views
1K
Replies
3
Views
700
Replies
18
Views
3K
Replies
12
Views
1K
Replies
1
Views
2K
Top