Question

In: Physics

The Ads side of the AdS/CFT correspondence is a model of quantum gravity in 5 dimensional...

The Ads side of the AdS/CFT correspondence is a model of quantum gravity in 5 dimensional antidesitter space. What can it say about quantum gravity in our 4-spacetime dimensions? Or is it just a toy model to better our understanding of quantum gravity as a whole?

Solutions

Expert Solution

The holographic priciple, as I understand it, is a general feature gravity has to obey due to its non-local behavior (as seen in the black hole entropy). These features should be there in any consistent theory of quantum gravity, and in this sense are more "general" than just string theory. It can in principle be formulated on any background, and the dual QFT has to have the asymptotic symmetries of the chosen background (asymptotically AdS has conformal symmetry).

The original Manldacena proposal is actually in 10-dimensions (critical superstring theory) where 5 of them are compactified (I think that the flux of higher form fields in the compactified dimensions play an important role, so its not enough to only keep the non-compact dimensions). Furthermore the duality can be generalized to other dimensions, 5 is not that special in this regard. There is for example a lot of work on AdS3/CFT2 holographic dualities these days.

But the crucial thing I want to say is that, the dual boundary theory is a local field theory and not a gravitational theory. Therefore the duality doesn't say too much about gravity in one lower dimension. The dual field theory "just" provides an alternative description of the (non-local) degrees of freedom in the gravitational theory.


Related Solutions

5. Consider a particle in a two-dimensional, rigid, square box with side a. (a) Find the...
5. Consider a particle in a two-dimensional, rigid, square box with side a. (a) Find the time independent wave function φ(x,y)describing an arbitrary energy eigenstate. (b)What are the energy eigenvalues and the quantum numbers for the three lowest eigenstates? Draw the energy level diagram
Consider the one dimensional model of one-particle-in-a-box. Under what condition the two quantum levels are orthogonal....
Consider the one dimensional model of one-particle-in-a-box. Under what condition the two quantum levels are orthogonal. Namely, find the relation between m and n so that < m | n > = 0
The quantum mechanical model of the hydrogen atom requires that if the principal quantum number =...
The quantum mechanical model of the hydrogen atom requires that if the principal quantum number = 5, there will be how many permitted orbital magnetic quantum numbers?
Use the quantum particle wavefunctions for the kinetic energy levels in a one dimensional box to...
Use the quantum particle wavefunctions for the kinetic energy levels in a one dimensional box to qualitatively demonstrate that the classical probability distribution (any value of x is equally allowed) is obtained for particles at high temperatures.
Explain the use of the gravity model in international economics.
Explain the use of the gravity model in international economics.
Discuss the advantages of dimensional and model analysis.
Discuss the advantages of dimensional and model analysis.
Can a particle in a 3 dimensional potential well experience quantum tunneling? Why or why not?...
Can a particle in a 3 dimensional potential well experience quantum tunneling? Why or why not? How about in two dimensions?
Consider a system of ? point particles obeying quantum mechanics constrained to move in a two-dimensional...
Consider a system of ? point particles obeying quantum mechanics constrained to move in a two-dimensional plane (1 2-D ideal quantum gas) in a microcanonical ensemble. Find a formula for the entropy ? via Ω, the number of microstates with energy ≤ ? and show that it is an extensive property of the system.
Explain the differences between the simple Keynesian (demand-side) model and the classical (supply side) model with...
Explain the differences between the simple Keynesian (demand-side) model and the classical (supply side) model with respect to fiscal policy, what can change Y (Real GDP), and any other things that you think are relevant. To answer this question correctly, you would need to: A) Explain why fiscal policy does not change the Yd curve in the classical model but does in the simple Keynesian model. B) Explain that in the classical model Y only changes if Ys changes. C)...
Choose the correct statement(s) about the values of the quantum numbers according to the Quantum Model...
Choose the correct statement(s) about the values of the quantum numbers according to the Quantum Model of the Hydrogen Atom: The maximum allowed value of the orbital quantum number is (n-1). The allowed values of the principle quantum number are 1, 2, 3, ... The allowed values of the orbital quantum number are 1, 2, 3, ... , (n-1). The allowed values of the orbital magnetic quantum number are - l, - l +1, ..., 0, ..., l -1, l.
ADVERTISEMENT
ADVERTISEMENT
ADVERTISEMENT