All Questions
Tagged with ads-cft string-theory
203
questions
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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)?
I just ran into the AdS/CFT correspondence, as I am looking at various use-cases of hyperbolic tessellations, specifically related to the pentagrid and heptagrid as defined by Maurice Margenstern in ...
- 2,200
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Replica wormholes in $AdS_5 \times S^5$ holography
I have a question about replica wormholes and the CFT ensembles in AdS/CFT. To make sure that my question isn't coming from a simple misunderstanding, I'll first sketch out my current understanding on ...
- 1,014
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Why does no one add Einstein-Hilbert term to CFT in AdS/CFT?
As I work through AdS/CFT exercises, it struck me that there seemed no one doing the following.
Suppose we have a holographic CFT. By some reeconstruction method, we can write CFT operators in terms ...
- 41
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49
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Energy conservation in string theory?
From what i understand string theory usually lives in a Minkowski Spacetime or AdS spacetime.
In Minkowski Spacetime conservation of energy is usually very straightforward, is this also the case in ...
- 117
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230
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Why and how we study different limits in quantum gravity?
While I'm reading an article, I get confused by why and how we study different limits in quantum limit.
In this paper, the author introduced four limits in D0-brane quantum mechanics: the DKPS (...
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51
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Relationship between CFT coupling constants and gravity parameters in the AdS/CFT correspondence
The AdS/CFT correspondence relates a string theory in AdS to quantum field theory. Various versions of this correspondence exist, and I want to know the map between parameters in the field theory and ...
- 45
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Why $N\to \infty$ limit implies $g_s \to 0$ in holographic QCD?
One basic difficulty in QCD is that it does not contain a small dimensionless quantity that would allow for perturbative calculation of low-energy observables.
A remarkable feature of holographic ...
- 227
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Gravity dual of the string world-sheet CFT?
The AdS/CFT correspondence conjectures a duality between a $(D+1)$ dimensional gravity theory in asymptotic AdS spacetime with a $D$ dimensional conformal field theory. Is there any sense in asking ...
- 125
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Why is empty AdS identified with CFT vacuum and what do excited states correspond to?
I have a few questions regarding the AdS/CFT dictionary regarding the state-state map.
I have seen people identifying the empty AdS spacetime with a CFT vacuum.
What do they mean by "empty" ...
- 785
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42
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Lorentz transformation relations (in AdS space) between coordinates of observers derived from the generators of symmetries in the AdS space
I have a question related to the Anti de Sitter Space in General Relativity. Please help me understand it:
In Anti de Sitter (AdS) spacetime, the symmetry generator operators are associated with ...
- 306
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243
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What does the WZ term in a WZW action means for string theory on group manifolds?
Let $G$ be a semi-simple Lie group. By Cartan's criterion its Killing form $B(X,Y)$ on $\frak g$ is non-degenerate. We can use it to define an inner product on the whole group by left translation
$${\...
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47
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Divergence of gauge kinetic coupling at the AdS boundary
This is the Einstein-Maxwell-Dilaton Gravity action:
\begin{eqnarray*}
S_{EM} = -\frac{1}{16 \pi G_5} \int \mathrm{d^5}x \sqrt{-g} \ [R - \frac{f(\phi)}{4}F_{MN}F^{MN} -\frac{1}{2}D_{M}\phi D^{M}\...
- 193
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58
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Integrating out the 5th dimension in AdS/CFT
My main understanding of AdS/CFT is through the idea that the partition functions on the boundary and bulk are equivalent when expressed in terms of source fields $J_0$. On the boundary $J_0$ is a ...
- 8,815
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Resources for studying holography for someone with a long gap in physics
for the past 3 years I haven't been reading up on physics and I'd now like to get back into it by learning about holography. I have done courses on QFT and String theory but some concepts I've ...
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AdS-CFT on a torus
A gauge theory at finite volume and temperature on a space like $S^{n-1}\times S^1$ is supposed to be dual to a string theory on either $AdS_{n+1}$ or a Schwarzschild black hole in $AdS_{n+1}$, with a ...
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