All Questions
Tagged with algebraic-topology topology
6
questions
1
vote
2
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366
views
How is a wormhole (Einstein-Rosen Bridge) different than a tunnel?
What is the difference between an Einstein-Rosen Bridge (wormhole) and a tunnel through a mountain? Obviously, light that travelled around the mountain would take longer to reach other side so that ...
- 79
4
votes
1
answer
222
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Can topological invariants be related to Noetherian charges?
I recently attended a seminar on physical mathematics, and learned about some topological invariants, especially in 4D spaces.
These topological invariants are considered to be invariant under ...
- 55
0
votes
1
answer
45
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What is the correct domain of integration for the index of instantons? - $\mathbb{R}^4$ or $S^4$?
I posted the original question on Math SE but it seems like a more appropriate question for Physics SE:
https://math.stackexchange.com/q/4417225/
In calculating the instanton solutions for $SU(2)$ ...
- 1,669
2
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0
answers
144
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String topology in string theory
How do string topology, string field theory and topological strings interact? Does anybody see a global picture? By string topology I mean the TQFT based on the homology of the space of loops ...
- 131
3
votes
2
answers
338
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Physical application of Postnikov tower, String$(n)$ and Fivebrane$(n)$
We know that the Spin group is quite a useful concept in physics. For example, Spin$(3)=SU(2)$ (and Spin$(6)=SU(4)$) that describe gauge groups in the Standard model and the isospin symmetry in the ...
- 7,848
7
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What is the importance of studying degeneration on $M_g$
Let $M_g$ be the moduli space of smooth curves of genus $g$. Let $\overline{M_g}$ be its compactification; the moduli space of stable curves of genus $g$.
It seems to be important in physics to study ...
JaP