Questions tagged [ads-cft]
AdS/CFT is a special case of the holographic principle. It states that a quantum gravitating theory in Anti-de-Sitter (AdS) space is exactly equivalent to the gauge theory/Conformal Field Theory (CFT) on its boundary.
437
questions
8
votes
1answer
748 views
Derivation of the basic equation for Witten diagrams
I could understand the derivation of the "bulk-to-boundary" propagators ($K$) for scalar fields in $AdS$ but the iterative definition of the "bulk-to-bulk" propagators is not clear to me.
On is ...
8
votes
1answer
615 views
About the general expression of trace anomaly and CFT partition functions
I have put up a question here,
https://mathoverflow.net/questions/139685/proof-of-the-general-expression-for-anomaly-in-a-cft-and-its-partition-function
Here I am putting up a slightly different ...
8
votes
1answer
623 views
Asymptotic Symmetry Group of General Relativity
This question is a little vague and I hope I can put across what I am looking for without too much confusion.
What is the motivation behind studying asymptotic symmetry groups in the context of ...
8
votes
1answer
403 views
Generalisations of AdS/CFT with string theory on both sides
From my previous post, I found out from the comments that there are various generalisations of AdS/CFT with different things replacing the CFT on the RHS; such as AdS/CMT, AdS/QCD, and also with ...
asked Aug 23 '13 at 19:43
Abhimanyu Pallavi Sudhir
5,6334 gold badges29 silver badges48 bronze badges
8
votes
0answers
356 views
What is the physical interpretation of the Papadodimas/Raju mirror operators?
In this paper
http://arxiv.org/abs/1310.6335,
the authors discuss the firewall problem and contruct so called mirror operators appearing in the correlation function. The key part seems to be (2.6) ...
7
votes
2answers
544 views
String Field Theory and AdS/CFT
I am a PhD student and I am choosing the topic to work on in the graduate school. I am interested in various non-perturbative aspects of String Theory. Does anybody know if there were any attempts to ...
7
votes
1answer
1k views
Classical theories and AdS/CFT
While editing the tag wiki for ads-cft, I initially wrote something on the lines of:
The AdS/CFT correspondence is a special case of the holographic principle. It states that a gravitating theory in ...
asked Jul 27 '13 at 18:28
Abhimanyu Pallavi Sudhir
5,6334 gold badges29 silver badges48 bronze badges
7
votes
1answer
776 views
What is on the AdS side in AdS/CFT supergravity or string theory?
What really is on the AdS side in AdS/CFT, does it always have to be string theory or is sometimes supergravity "enough" or better suited to do calculations?
From the answers to my earlier question, ...
7
votes
1answer
672 views
Viscosity/Entropy ratio and unitary evolution in quantum gravity
Calculations of the shear viscosity of the quark-gluon plasma (QGP), observed in heavy ions collisions, are performed via the AdS/CFT correspondence [ref1]. One finds that the shear viscosity of the ...
7
votes
1answer
363 views
Wilson Loop in AdS/CFT
In AdS/CFT correspondence one can compare results in $\mathcal{N}=4$ SYM with string theory type IIB in $AdS_5 \times S^5$. One of the observables that it's possible to get non-perturbative results is ...
7
votes
2answers
1k views
How much can AdS/CMT tell us?
I will begin my research on AdS/CMT, however I find AdS/CMT is only a phenomelogical method, so I want to know can AdS/CMT give some results the condensed matter physicists can not give, or even ...
7
votes
1answer
423 views
How would one experimentally prove AdS/CFT correspondence?
What would be an experimental test of AdS/CFT correspondence? Or it's extensions?
I've heard that people are studying AdS/CMT (condensed matter) correspondence, but I don't know the details of it?
...
7
votes
1answer
458 views
What's the relation between the Euler $\psi$ function, the digamma function, and the hypergeometric function?
Can somebody help me out with the intermediate details of eqn. (2.5) in this paper?
Generalized gravitational entropy. Aitor Lewkowycz and Juan Maldacena. arXiv:1304.4926.
Is the Euler $\psi$ ...
7
votes
1answer
473 views
Flat Space Limit of AdS/CFT is S-Matrix Theory
In an answer to this question, Ron Maimon said:
The flat-space limit of AdS/CFT boundary theory is the S-matrix theory
of a flat space theory, so the result was the same--- the "boundary"
...
7
votes
1answer
110 views
Are all the asymptotic symmetries always infinite dimensional?
We know that the asymptotic symmetry of AdS$_3$ is the Virasoro symmetry, which is infinite dimensional. For flat spacetimes, the BMS group is also infinite dimensional. So are all the asymptotic ...
7
votes
2answers
199 views
Why are holomorphic boundary CFT2 primary operators massless in the AdS3 bulk?
I saw a claim in this paper that holomorphic boundary CFT$_2$ primary operators correspond to massless states in the AdS$_3$ bulk. Specifically,
As always, we simplify the situation by assuming the ...
7
votes
1answer
379 views
What do we learn from gravity in three spacetime dimensions?
The last decades there has been a lot of research going on in the the area of three dimensional gravity. The motivation, I understand, is threefold:
Whereas gravity is not perturbatively ...
7
votes
1answer
535 views
Chemical Potential in AdS/CFT
In AdS/CFT a charged Black hole is probably someway equivalent to introducing a chemical potential (Chemical potential) at the boundary theory. Is there a quick way to see how it is or how does this ...
7
votes
0answers
86 views
Collapse of two large black holes in AdS
In $4d$ flat space, two black holes of mass $M$ can collapse to form another one of (roughly) mass $2M$. This process is spontaneous, as reflected by the fact that the black hole entropy $S=M^2$ ...
7
votes
2answers
380 views
Is there some no-go theorem for $D=9$ Kaluza Klein QCD+EM?
While QCD is a typical product of AdS/CFT and some other research trends in extra dimensions, I have never found in the literature an example producing the non-chiral part of the standard model, ...
6
votes
2answers
116 views
de-Sitter space as near-horizon limit of Black Holes
We know that we can obtain $AdS_{2}$ x $S_{2}$ spacetime as the near-horizon geometry of an extremal/ near extremal RN (or Kerr) Black Hole in asymptotically flat spacetime. It is also known that we ...
6
votes
3answers
369 views
What happens at the center of a black hole according to holographic theory?
As far as I understand, the AdS/CFT correspondence proposed by Maldacena is an exact duality to a four-dimensional theory, which interpolates between one well-defined conformal field theory in the UV ...
6
votes
1answer
384 views
Has AdS/CFT any predictive power in the natural context?
Has AdS/CFT any predictive power in the case of the space-time as we know it and in the case of reality as we know it experimentally?
I may add: AdS/CFT in the interpretation given from the ...
6
votes
1answer
524 views
Has Sen quantized superstring fields?
Today I saw a paper by Ashoke Sen titled "BV Master Action for Heterotic and Type II String Field Theories".
Is it really the "quantization" of superstring fields for the first time?
What can be its ...
6
votes
1answer
636 views
Conformal compatification of Minkowski and AdS
How do I show that the compactification of Minkowski is given by the quadric
$$uv-\eta_{ij}x^{i}x^{j}=0$$
with an overall scale equivalence in the coordinates.I get that for $v \neq 0$, the surface ...
6
votes
1answer
626 views
Diffeomorphisms and boundary conditions
I am trying to find out how did the authors in this paper (arXiv:0809.4266) found out the general form of the diffeomorphism which preserve the boundary conditions in the same paper.
I found this ...
6
votes
1answer
302 views
Questions on D branes and their role in the AdS/CFT correspondence
I'm a beginner in learning the AdS/CFT correspondence, and I come across two problems that I hope an answer will be given here.
D branes in string theory are usually introduced through the T-duality ...
6
votes
1answer
468 views
Taking the continuum limit of $U(N)$ gauge theories
I would like to draw your attention to appendix $C$ on page 38 of this paper.
The equation $C.2$ there seems to be evaluating the sum $\sum_R \chi _R (U^m)$ in equation 3.16 of this paper. I ...
6
votes
1answer
473 views
Turbulence parameterization from gravity - fluid dynamics correspondence
I`m looking for a nice introductary reference that explains how the turbulence coefficient or any kind of turbulence parameterization (in view of applications to atmospheric turbulence for example) ...
6
votes
1answer
160 views
Connection between asymptotic behavior of scalar field and scaling dimension in $AdS_4$
In Gubser's famous paper on breaking Abelian gauge symmetry near a black hole horizon, he talks about how to connect the asymptotic behavior of the scalar field $\psi$ to the scaling dimension $\Delta$...
6
votes
1answer
755 views
Quenched systems - disorder average (SYK model)
In a system with quenched disorder one is usually looking for self-averaging quantities, i.e., quantities such that the average over the couplings produces a ``typical" configuration in the ...
6
votes
1answer
259 views
Superconformal approach to supergravity
In the book (Supergravity - Daniel Z.Freedman & Antoine Van Proeyen - Cambridge), there is (Chapters 16-17) a presentation of pure supergravity or supergravity with matter, from a superconformal ...
6
votes
1answer
204 views
About the duality when embedding Gopakumar-Vafa into superstring theory
Vafa proposed a duality when embedding the Gopakumar-Vafa duality into superstring theory. Vafa's duality is about a correspondence N=1 supersymmetric gauge theory and superstring propagating on ...
6
votes
1answer
533 views
Gravity duals to Navier Stokes and interpretation of non linear contributions
I have been reading the paper The Incompressible Non-Relativistic Navier-Stokes Equation from Gravity. In it they state,
"An instability, if it occurs, must necessarily break a symmetry ...
...
6
votes
1answer
215 views
Help with the understanding of boundary conditions on $AdS_3$
So I am trying to reproduce results in this article, precisely the 3rd chapter 'Virasoro algebra for AdS$_3$'. I have the metric in this form:
$$ds^2=-\left(1+\frac{r^2}{l^2}\right)dt^2+\left(1+\frac{...
6
votes
1answer
297 views
Master Field Large N limit
I would like to ask a question about the so-called ''Master Field''. As far as I understand, this represents a classical configuration in the large n limit (saddle point solution) but there is no ...
6
votes
0answers
208 views
Can pure-bosonic string theories exist in curved spacetime?
Question: Can there be a consistent non-supersymmetric pure-bosonic string theory in some curved spacetimes?
Reason: Since fields with certain amount of negative mass can exist in curved spacetime (...
6
votes
0answers
652 views
The surface area to volume ratio of a sphere and the Bekenstein bound
I am trying to relate the surface-area-to-volume-ratio of a sphere to the Bekenstein bound. Since the surface-area-to-volume-ratio decreases with increasing volume, one would surmise that, per unit of ...
6
votes
0answers
449 views
Partition Functions in (A)dS/CFT
I'm trying to understand some aspects of dS/CFT, and I'm running into a little trouble. Any help would be much appreciated.
In arXix:1104.2621, Harlow and Stanford showed that the late-time Hartle-...
6
votes
0answers
170 views
Can quark-gluon plasma ever be close to an ideal gas of asymptotically free quarks?
The question inspired by an upcoming colloquim at UCB.
A naive interpretation of quark asymptotic freedom seems to imply that at high enough energies they should be weakly interacting. On the other ...
6
votes
1answer
499 views
A basic question on AdS/CFT
Previously I asked a question Question on dimensions of CFT operators (ref: MAGOO, hep-th/9905111) here and it was (correctly of course) answered by Motl. I realized I didn't understand a part of it ...
5
votes
2answers
259 views
AdS/CFT Group Theory
I have a two part question about AdS/CFT:
Is the only necessary ingredient that the isometry group of AdS matches the conformal group in one dimension less or are there other prerequisites to build a ...
5
votes
2answers
364 views
Is there non-locality in the AdS/CFT?
Many String theorists are trying to restore bulk locality in the AdS/CFT. So does that mean the CFT, the boundary, is non-local? Does matter travel faster than light on the CFT?
5
votes
3answers
1k views
AdS/CFT correspondence and M-theory
Three questions:
What can be some applications of AdS/CFT correspondence on M-theory? For example, would it be possible to represent 11-dimensional world using 10-dimensional surface?
It seems that ...
5
votes
1answer
515 views
Some questions about the paper, “AdS description of induced higher spin gauge theory”
I am referring to this paper.
I guess that in this paper one is trying to relate the massless spin $s$ gauge fields in $AdS_4$ to conformal spin $s$ theory on $S^3$.
So am I right that the ...
5
votes
2answers
436 views
Can the study of the quantum information structure in QFT with holographic duals be relevant to string theory?
I'm interested in characterizing the behaviour of measures of quantum information in strongly correlated quantum field theories which admit a gravity dual description, e.g through AdS/CFT duality. In ...
5
votes
1answer
253 views
Is $\mathcal{N} = 4$ SYM a “toy model”?
The second sentence of the Wikipedia article on $\mathcal{N} = 4$ supersymmetric Yang-Mills theory describes it as "a simplified toy theory." But the AdS/CFT correspondence conjectures that it is ...
5
votes
1answer
281 views
AdS Black holes
How is the mass of the black hole defined in a asymptotcally AdS solution of the black hole? How can I find it?
Beacause in asymptotcally flat solution I can read it from the $g_{tt}$ component of the ...
5
votes
1answer
807 views
Boundary conditions in AdS/CFT
This question is in reference to this very famous paper of Witten.
In general through the whole paper why is the author able to just focus on the scalar field propagating in the bulk and not need to ...
5
votes
1answer
107 views
What are the necessary conditions for a CFT to have a holographic dual? [duplicate]
The number of degrees of freedom of a CFT is given by its central charge $c$. From the bootstrap point of view, any CFT is characterized by the knowledge of its "CFT data", i.e. the scaling dimensions ...
