REVIEW
On the Holographic Renormalization Group
High Energy Physics - Theory · Submitted 2 Dec 1999 · 17 references
Pith's verdict: The Hamilton-Jacobi route from 5-d gravity to the Callan-Symanzik equation holds up; the derivative-expansion matching is the soft part, and the two beta-function expressions are never checked against each other.
T0 · AI review
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Referee report
The paper
The paper claims
The paper argues that the radial evolution equations of five-dimensional supergravity are exactly the renormalization group equations of the dual four-dimensional gauge theory, with the classical supergravity action playing the role of the.
The reading
What carries the argument
The engine is Hamilton-Jacobi theory applied to gravity with the radial coordinate as time: the canonical momentum conjugate to a field equals the functional derivative of the on-shell action, $pi_I = (1/sqrt{g}) delta S/delta phi^I$ and $pi^{m n} = (1/sqrt{g}) delta S/delta g_{m n}$, so the Hamiltonian constraint becomes a functional differential equation that fixes the form of $S$ rather than an equation of motion for the boundary fields. Inserting the split into a local piece carrying a potential $U$, a Ricci coupling $Phi$ and a kinetic matrix $M_{I J}$, plus a non-local remainder $Gamma$, and requiring terms of the same functional form to cancel, converts one gravitational constraint into a whole set of renormalization group statements at once. The potential $U$ plays the role of a superpotential and its gradient gives the $\beta$ functions; the coefficients of the local counterterms encode the flow of the couplings.
Extended reading notes
Core claim
The central claim is that the Hamilton constraint of five-dimensional gravity, read as a functional differential equation for the on-shell action $S$, together with a derivative expansion $S = S_{loc} + Gamma$, reproduces the standard renormalization group structure of the boundary theory. Matching the potential terms gives $V = (1/3)U^2 - (1/2) partial_I U G^{I J} partial_J U$, the same relation a superpotential would satisfy, without assuming supersymmetry. Matching the curvature and kinetic terms gives $beta^K partial_K Phi = 2Phi + 6U$ and a corresponding equation for the matrix $M_{I J}$ of two-derivative couplings, and cancelling a leftover $nabla^2 phi$ term gives a further expression for the $\beta$ function in purely four-dimensional terms, $beta^I = M^{I J} partial_J Phi$. Dropping local terms with two or fewer derivatives then leaves a flow equation for the non-local part, $(1/sqrt{g})(g_{m n} delta/delta g_{m n} - beta^I delta/delta phi^I) Gamma = text{4-derivative terms}$, which upon varying and going to a flat background becomes the Callan-Symanzik equation for $n$-point functions with anomalous dimensions $gamma^I{}_J = nabla_I beta^J$. Relaxing flatness gives a trace anomaly $langle T rangle = beta^I partial_I Gamma + c R_{m n}R^{m n} - d R^2$ with $c = 6Phi^2/U$ and $d = 2U(Phi^2 - (3/2) partial_I Phi G^{I J} partial_J Phi)$, which at a fixed point collapses to $c = 3d = (V/3)^{-3/2} = lambda^3/8$, matching the earlier holographic Weyl anomaly computation.
Load-bearing premise
The argument rests on splitting the action into a local piece plus a non-local remainder and matching terms of the same functional form order by order; the authors state this is a systematic expansion only at scales well below the cutoff, and their appendix shows the constraint leaves the dimension-four part of the potential undetermined.
Editorial extensions
If this is right
- The radial coordinate of the five-dimensional geometry is an energy scale, and the classical supergravity action evaluated at a finite radius is the generating functional of the dual theory at a finite ultraviolet cutoff.
- The counterterms multiplying the four-dimensional cosmological constant and Newton constant are not free parameters: they are determined by the beta functions through $beta^K partial_K Phi = 2Phi + 6U$ and the corresponding equation for $M_{I J}$.
- At a fixed point the anomaly coefficients satisfy $c = 3d = lambda^3/8$, reproducing the known holographic Weyl anomaly and giving a candidate monotonic quantity along the flow.
- The inequality $U^2 geq 3V$ follows from positivity of the beta-function squares, with equality only at fixed points, so the flow is forced to move monotonically in the potential.
- The construction is not tied to a particular dual pair and extends to other dimensions and to any gauge theory obtainable as a relevant or marginal perturbation of a large-$N$ conformal theory.
Reading between the lines
- If the identification holds, the Hamilton-Jacobi equation is the leading large-$N$ limit of an exact renormalization group equation; keeping the second-order term the authors mention in their outlook would give a concrete way to test this order by order in $1/N$.
- The relations tying beta functions to the Ricci and Newton-constant counterterms suggest that four-dimensional Einstein equations with a cosmological term may be a restatement of the flow equations, which the paper defers to a companion work; a reader could check whether any consistent four-dimensional gravity dual forces the beta functions to obey $beta^I = M^{I J} partial_J Phi$.
- Because the appendix shows the constraint fixes only the divergent part of $U$ and leaves dimension-four terms free, those free terms are plausibly the same freedom as scheme choice and local field redefinition on the field theory side, which would make the scheme dependence of the anomaly coefficients explicit.
Original abstract
We propose a direct correspondence between the classical evolution equations of 5-d supergravity and the renormalization group (RG) equations of the dual 4-d large $N$ gauge theory. Using standard Hamilton-Jacobi theory, we derive first order flow equations for the classical supergravity action $S$, that take the usual form of the Callan-Symanzik equations, including the corrections due to the conformal anomaly. This result gives direct support for the identification of $S$ with the quantum effective action of the gauge theory. In addition we find interesting new relations between the beta-functions and the counterterms that affect the 4-d cosmological and Newton constant.
The compiled record
The paper's own sentences, arranged, kept beside the review and separate from it. Each label is drawn from a closed vocabulary; the number beside it is the probability the classifier gave that label. Numbers in the tables are the authors', checked by code. No sentence in this record was written by a model.
The abstract, sentence by sentence
We propose a direct correspondence between the classical evolution equations of 5-d supergravity and the renormalization group (RG) equations of the dual 4-d large $N$ gauge theory. Using standard Hamilton-Jacobi theory, we derive first order flow equations for the classical supergravity action $S$, that take the usual form of the Callan-Symanzik equations, including the corrections due to the conformal anomaly. This result gives direct support for the identification of $S$ with the quantum effective action of the gauge theory. In addition we find interesting new relations between the beta-functions and the counterterms that affect the 4-d cosmological and Newton constant.
background contribution method result interpretation main claim
| # | sentence | role | the authors' own work | states the main conclusion | strength |
|---|---|---|---|---|---|
| s0 | We propose a direct correspondence between the classical evolution equations of 5-d supergravity and the renormalization group (RG) equations of the dual 4-d large $N$ gauge theory. | contribution 0.98 | 0.86 | 0.69 | asserted 0.67 |
| s1 | Using standard Hamilton-Jacobi theory, we derive first order flow equations for the classical supergravity action $S$, that take the usual form of the Callan-Symanzik equations, including the corrections due to the conformal anomaly. | method 0.55 | 0.96 | 0.16 | asserted 1.00 |
| s2 | This result gives direct support for the identification of $S$ with the quantum effective action of the gauge theory. | interpretation 0.99 | 0.78 | 0.38 | asserted 0.76 |
| s3 | In addition we find interesting new relations between the beta-functions and the counterterms that affect the 4-d cosmological and Newton constant. | result 0.98 | 0.95 | 0.07 | asserted 1.00 |
What was examined, and what was not
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References
How later papers used it
248 later papers cite it
7 later papers by other authors are listed below: 1 built on it and 6 used its method or tool.
Builds on it 1 paper
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We think of this as extending the holographic RG methods of [ref] deeper into the bulk.
Brane effective actions and their island rule from $T\overline T$ flows (2026) · Introduction and overview of results · 0.88
Uses its method or tool 6 of 31 papers with this label
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First, following [ref] , we expand the flow equations [ref] and [ref] in derivatives.
Gradient Flow and Holography from a Local Wilsonian Cutoff (2021) · The Hamiltonian Constraint · 0.80
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Made use of this paper's observation for a theory involving only second derivatives.
Holographic Heat Current as Noether Current (2017) · 0.98 · paraphrased: the licence does not allow quoting
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As in this paper, imagined that the boundary action on a radial slice can be evaluated as a function of boundary field values at that scale.
On $AdS_2$ holography from redux, renormalization group flows and $c$-functions (2018) · 0.92 · paraphrased: the licence does not allow quoting
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Made use of the Hamilton-Jacobi method first used in the context of AdS/CFT by this paper.
First order flow for non-extremal AdS black holes and mass from holographic renormalization (2014) · 0.93 · paraphrased: the licence does not allow quoting
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Used the holographic renormalization, especially the Hamilton-Jacobi approach of this paper, to build up the most general ansatz for the intrinsic counterterms on the boundary.
Deep learning black hole metrics from shear viscosity (2020) · 0.90 · paraphrased: the licence does not allow quoting
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By means of the holographic renormalization group [ref] , we can identify this bulk radial cutoff with a IR cutoff in the dual boundary theory.
Magnetic Braneworlds: Cosmology and Wormholes (2024) · The dual description: $𝒩=4$ SYM and confinement · 0.86
How the literature uses it
229 arXiv papers cite this in 355 sentences
Papers whose main result relates to this one's
States the same result 1 paper
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We argue that the classical equations of motion in the SUGRA picture can be interpreted as that of the renormalization group on the SYM side.
A remark on the AdS/CFT correspondence and the renormalization group flow · 0.87
Papers citing it · 195 sentences without a confident label
Builds on it 1 paper
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We think of this as extending the holographic RG methods of [ref] deeper into the bulk.
Brane effective actions and their island rule from $T\overline T$ flows · Introduction and overview of results · 0.88
Uses its method or tool 26 papers
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Our algorithm for constructing the holographic dictionary hinges upon a certain asymptotic solution of the radial Hamilton-Jacobi (HJ) equation [ref] , subject to asymptotically Lif or hvLf boundary conditions.
Lifshitz holography: The whole shebang · Introduction · 0.91
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First, following [ref] , we expand the flow equations [ref] and [ref] in derivatives.
Gradient Flow and Holography from a Local Wilsonian Cutoff · The Hamiltonian Constraint · 0.80
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[ref] β(α)=3 α X , where $α(z)$ is defined as [ref] α(z)=e^φ(z) and $X$ is a new dynamical variable [ref] defined as X(z)=φ̇ B/3Ḃ , where $B(z)$ is defined in ([ref]) and $φ$ for the light and heavy quarks model are obtained in ([ref]) and [ref], respectively.
Beta-Functions and RG flows for Holographic QCD with Heavy and Light Quarks: Isotropic case · Beta-Function · 0.81
Compares with it 8 papers
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Eq. [ref] coincides with the Hamilton-Jacobi constraint in [ref] .
Gradient Flow and Holography from a Local Wilsonian Cutoff · The Hamiltonian Constraint · 0.98
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Furthermore, we will find that the beta function associated to the dimensionless coupling, $g_L = L^d-Δ$, is proportional to the derivative of the prepotential, $W'$, as opposed to the usual holographic beta function $W'/W$ [ref] .
Dimensional regularization for holographic RG flows · Introduction · 0.97
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The result we have just presented is very close in spirit to the seminal work of deBoer and Verlinde's [ref] .
Reconstructing AdS/CFT · Solving the Hamilton-Jacobi equation · 0.96
Cites it as support 1 paper
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The ideas coming from the AdS/CFT correspondence [ref] where renormalization group flows can be formulated holographically [ref] and scale or Weyl anomalies become geometric [ref] further strengthen our belief that the anomaly can be resolved by our approach.
Unit Invariance as a Unifying Principle of Physics · AdS/CFT Correspondence · 0.98
Cites it as background 102 papers
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Second, we reviewed the holographic description of the renormalization group flow which implies Hamiltonian constraints on the action on the boundary of a 5d manifold, following to a large extend [ref] .
Gradient Flow and Holography from a Local Wilsonian Cutoff · Summary and Outlook · 0.95
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The question is whether the `traditional' holographic RG flow coming from the classical equation of motion [ref] is the same as the more recently formulated one in [ref] .
Holographic Wilsonian RG Flow and Sliding Membrane Paradigm · Introdution · 0.81
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There is a vast literature on the subject of AdS/CFT, however we feel that only a relative small portion of it focuses on the questions asked here : First there is the key original reference of Witten [ref] where the meaning of the correspondence is proposed; the body of work by Skenderis et al. [ref] developing the semi-classical understanding of the correspondence and the holographic renormalisation group; the central claim of Verlinde's and deBoer [ref] that there is a relationship between the Hamilton-Jacobi equation and the holographic renormalisation group, and a Schrödinger picture sketched by Maldacena [ref] in the de Sitter context.
Reconstructing AdS/CFT · Introduction · 0.99
Discussion
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