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Number of independent reparametrization gauge invariances of the 'world $(n+1)$-manifold action' of $n$-dimensional objects

GSW is merely stating the fact that an $(n+1)$-dimensional world volume has $(n+1)$-dimensional local coordinate systems, or equivalently, is parametrized by $n+1$ independent parameters $\sigma^{\...
Qmechanic's user avatar
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1 vote

Feynman diagrams in string theory

There is an excellent paper relevant to your question https://arxiv.org/pdf/1011.0456. What is usually seen as interactions between two close strings, or gravitons, which are D1 branes, moving forward/...
Tanmoy Pati's user avatar
2 votes
Accepted

How do hyperbolic tessellations like {7,3} in Anti de-Sitter space relate to our intuition of 3D space (or 4D structure if you include time)?

AdS/CFT does not usually involve the hyperbolic plane. The original examples due to Maldacena involve higher-dimensional hyperbolic spaces. The best known example features string theory in a five-...
Mitchell Porter's user avatar
2 votes

Does string theory shed light on foundations of quantum theory?

Yes, it does. For example, Kontsevich approach to deformation quantization leads to the A-model topological string which can be alternatively be reached through path integral, due to Witten. This lead ...
Nogueira's user avatar
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1 vote
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Why does no one add Einstein-Hilbert term to CFT in AdS/CFT?

This actually is something related to something that people have tried, and is called double holography. Instead of two dual theories, there are three perspectives one could take on this system. See ...
11zaq's user avatar
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0 votes

Is the background independence of dynamics a necessary condition for physical theories?

It depends on the meaning of physical theories. E.g., classical electrodynamics and classical Newtonian are examples of physical theories that are not completely background independent. Of course, ...
Lukas Nullmeier's user avatar
0 votes

Low-energy string effective action valid for large dilaton field?

The above action is not valid for large (positive) dilaton values, but that's not the end of the story. The perturbative expansion for the partition function of the string worldsheet schematically ...
11zaq's user avatar
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2 votes

How do compact dimensions determine the particle content of string theory?

I would like to answer this question for the case of E8xE8 heterotic string theory, since that was the basis of many models. But it doesn't really work the way you're thinking. For example, in 10 ...
Mitchell Porter's user avatar
0 votes

Equation of Motion for Polyakov Action with a mass term

Your problem is in your matter action you forgot a 1/2 factor in the tension, the action should be $$S = - \frac{T}{2} \int \mathrm{d}^2 \xi \sqrt{- \gamma} \left( \gamma ^{a b} \partial _a x^{\mu} \...
Luigi Teixeira de Sousa's user avatar
2 votes

What do we learn from quantizing the relativistic point particle?

I will give a different perspective on the worldline formalism. Yes, the worldline formalism is perturbative, where the worldline proper time is the Schwinger proper time. However, once we use BRST ...
Nogueira's user avatar
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