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Kaluza-Klein Holography

High Energy Physics - Theory · Submitted 2 Mar 2006 · 37 references

Pith's verdict: A genuinely new holographic map for KK operator vevs, with a flagship O4 test that is a consistency check rather than a parameter-free prediction because the extremal boundary coefficient is fitted to free-field theory, as the paper openly states.

T0 · AI review

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arXiv IDhep-th/0603016 (version 2)
Pith IDB5Y4MP4J, Pith's permanent record of this paper and its review
CitationKostas Skenderis, Marika Taylor. "Kaluza-Klein Holography." arXiv:hep-th/0603016 (2006). https://pith.science/paper/B5Y4MP4J
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Claim paper

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Referee report
The paper

The paper claims

A new holographic map reads quantum field theory expectation values directly from the asymptotic shape of ten-dimensional supergravity solutions, and it passes its first precision test on the Coulomb branch.

The reading

The paper constructs a procedure that turns any solution of ten-dimensional supergravity asymptotic to $\mathrm{AdS}_5 \times S^5$ into a complete list of vacuum expectation values of the gauge-invariant operators of the dual four-dimensional quantum field theory. The procedure combines gauge-invariant Kaluza-Klein variables, a non-linear map from ten-dimensional fields to five-dimensional fields, and holographic renormalization, with special care for extremal couplings that produce boundary contributions absent from the bulk action. The authors apply the map to the Coulomb branch solution dual to a uniform distribution of D3-branes, and reproduce the field-theory values of the dimension-2 and dimension-4 operator vevs exactly. This is the first quantitative test of the gravity/gauge duality away from the conformal fixed point involving an operator dual to a massive KK mode rather than a gauged supergravity field.

What carries the argument

The load-bearing objects are: (i) gauge-invariant combinations of the ten-dimensional metric and five-form fluctuations (constructed to quadratic order in fields), which let one lift results from the de Donder gauge to any gauge; (ii) the non-linear KK map, the field redefinition that removes higher-derivative interaction terms from the five-dimensional equations and produces the five-dimensional action; and (iii) holographically renormalized one-point functions, which relate vevs to particular coefficients in the radial momentum expansion, supplemented by boundary terms for extremal couplings. The identity that carries the argument is the corrected one-point function $\langle O_4\rangle = \pi^{(4)}_4 + a_{422}(\pi^{(2)}_2)^2$, where the second term encodes the extremal boundary contribution and is fixed by matching the free-field three-point function.

Extended reading notes

Core claim

The central claim is that the holographic dictionary can be extended beyond the fields of five-dimensional gauged supergravity to the full tower of Kaluza-Klein modes, and that the extra nonlinear terms in the map are essential: quadratic (and higher) contributions involving lower-dimension fields enter at exactly the same radial order as the linear normalizable mode of the higher-dimension field. Concretely, the one-point function of the dimension-4 operator is not just the momentum coefficient $\pi^{(4)}_4$ but $\langle O_4\rangle = \pi^{(4)}_4 + a_{422}(\pi^{(2)}_2)^2$, with $a_{422}$ fixed by the free-field extremal three-point function; the boundary term, not the bulk coupling, reproduces the field-theory vev. Applied to the Coulomb branch solution, the dimension-2 and dimension-4 vevs match the weakly coupled field theory values exactly, as required by non-renormalization theorems.

Load-bearing premise

The calculation assumes that the one-point functions of extremal KK operators take the form (5.12)-(5.13), with the coefficients $a_{422}$ and $a_{6222}$ fixed by matching to free field theory rather than derived from the ten-dimensional variational principle; the paper states that a detailed derivation is left for future work.

Editorial extensions

If this is right

  • The asymptotics of any asymptotically $\mathrm{AdS}_5 \times S^5$ solution determine all operator vevs, not just those of gauged supergravity fields; non-linear terms of the KK map must be kept because they contribute at the same radial order as linear terms.
  • The dimension-4 vev of the Coulomb branch solution receives its entire contribution from the boundary term $a_{422}(\pi^{(2)}_2)^2$, since the normalizable mode of $S_4$ vanishes; the exact field-theory value emerges from the boundary term alone.
  • The dimension-6 vev prediction is partially tested: the non-linear term accounts for exactly one fifth of the field theory result, requiring a non-zero normalizable mode of $S_6$ that remains to be extracted from higher-order (quartic) couplings.
  • The method is algorithmic and generalizes to any compactification $\mathrm{AdS}_m \times X$, so the same procedure can be applied to other supergravity solutions to identify or verify their QFT duals.
  • Since the map is invertible (field-theory vevs are the radial canonical momenta), QFT data uniquely determine the asymptotic bulk solution; this may allow 'holographic engineering' of dual geometries from field theory data.

Reading between the lines

Editorial extensions of the paper, not claims the author makes directly.

  • The structure of the corrected one-point functions suggests that extremal and near-extremal correlators of all chiral primary operators factorize into products of two-point functions, giving a uniform explanation of the non-renormalization of these correlators from the boundary-term mechanism.
  • The same boundary-term mechanism should apply to the full tower of KK modes, implying that the naive 'normalizable mode equals vev' rule fails precisely in extremal channels; tests on non-supersymmetric vev flows could distinguish bulk and boundary contributions.
  • One could test the map on a different Coulomb branch distribution (e.g., a non-uniform density), where the dimension-4 vev would be a different combination; the formula $\langle O_4\rangle = \pi^{(4)}_4 + a_{422}(\pi^{(2)}_2)^2$ predicts it purely from the dimension-2 vev, a check not yet in the paper.
  • Completing the derivation of the boundary-term coefficients from a full ten-dimensional variational principle may reveal a general principle: boundary terms in the reduced action are fixed by requiring that extremal correlators factorize, which could be proven directly from the holographic Ward identities.
Original abstract

We construct a holographic map between asymptotically AdS_5 x S^5 solutions of 10d supergravity and vacuum expectation values of gauge invariant operators of the dual QFT. The ingredients that enter in the construction are (i) gauge invariant variables so that the KK reduction is independent of any choice of gauge fixing; (ii) the non-linear KK reduction map from 10 to 5 dimensions (constructed perturbatively in the number of fields); (iii) application of holographic renormalization. A non-trivial role in the last step is played by extremal couplings. This map allows one to reliably compute vevs of operators dual to any KK fields. As an application we consider a Coulomb branch solution and compute the first two non-trivial vevs, involving operators of dimension 2 and 4, and reproduce the field theory result, in agreement with non-renormalization theorems. This constitutes the first quantitative test of the gravity/gauge theory duality away from the conformal point involving a vev of an operator dual to a KK field (which is not one of the gauged supergravity fields).

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.

Compiled by classifier-1.13-20260917 via OpenRouter, question bank abstract-p1-20260923, 2026-09-23: 1 request, 5,120 input tokens, $0.0002 reported.

What the abstract itself states, as probabilities: claims first 0.91 · states limitation 0.21 · human participants 0.01 · controlled comparison 0.04 · randomized assignment 0.01 · states quantitative result 0.31 · compares with prior results 0.80 · mentions code or data availability 0.02.

The abstract, sentence by sentence

arXiv listing abstract v2. Results and the main claim are underlined; .

We construct a holographic map between asymptotically AdS_5 x S^5 solutions of 10d supergravity and vacuum expectation values of gauge invariant operators of the dual QFT. The ingredients that enter in the construction are (i) gauge invariant variables so that the KK reduction is independent of any choice of gauge fixing; (ii) the non-linear KK reduction map from 10 to 5 dimensions (constructed perturbatively in the number of fields); (iii) application of holographic renormalization. A non-trivial role in the last step is played by extremal couplings. This map allows one to reliably compute vevs of operators dual to any KK fields. As an application we consider a Coulomb branch solution and compute the first two non-trivial vevs, involving operators of dimension 2 and 4, and reproduce the field theory result, in agreement with non-renormalization theorems. This constitutes the first quantitative test of the gravity/gauge theory duality away from the conformal point involving a vev of an operator dual to a KK field (which is not one of the gauged supergravity fields).

background contribution method result interpretation main claim

What the classifier reports for each sentence. The number is the probability it gave the label.
#sentencerolethe authors' own workstates the main conclusionstrength
s0 We construct a holographic map between asymptotically AdS_5 x S^5 solutions of 10d supergravity and vacuum expectation values of gauge invariant operators of the dual QFT. contribution 1.00 0.95 0.48 asserted 1.00
s1 The ingredients that enter in the construction are (i) gauge invariant variables so that the KK reduction is independent of any choice of gauge fixing; (ii) the non-linear KK reduction map from 10 to 5 dimensions (constructed perturbatively in the number of fields); (iii) application of holographic renormalization. method 0.98 0.76 0.05 asserted 0.96
s2 A non-trivial role in the last step is played by extremal couplings. method 0.90 0.60 0.04 asserted 1.00
s3 This map allows one to reliably compute vevs of operators dual to any KK fields. contribution 0.40 0.75 0.28 asserted 0.91
s4 As an application we consider a Coulomb branch solution and compute the first two non-trivial vevs, involving operators of dimension 2 and 4, and reproduce the field theory result, in agreement with non-renormalization theorems. result 0.89 0.95 0.17 asserted 1.00
s5 This constitutes the first quantitative test of the gravity/gauge theory duality away from the conformal point involving a vev of an operator dual to a KK field (which is not one of the gauged supergravity fields). interpretation 0.94 0.89 0.53 asserted 1.00

What kind of paper the classifier reports this is: method or tool 0.79 · evidence from proof or derivation 0.97.

What was examined, and what was not

sources read
  • arXiv listing abstract v2
not examined
  • full text
  • figures and tables
  • references and citing sentences
  • relations to other papers
levels run
  • P abstract
not run
  • S sections
  • T body sentences
  • C citations
  • R cross-paper relations

Every quoted sentence on this record is the authors'. Every label is from Pith's closed vocabulary, with the probability shown beside it. Every number in the measurements table is the authors', checked by code. Record as JSON

References
How the literature uses it

42 arXiv papers cite this in 103 sentences

Each citing sentence is taken from the citing paper's LaTeX source and typed by Pith's classifier. A label appears at probability 0.8 or more (0.95 for support), a contest at 0.7 or more; the quoted words are the citing authors'. How each label was checked · JSON

Papers citing it · 57 sentences without a confident label

Builds on it 1 paper
Uses its method or tool 13 papers
  • We then apply the Kaluza-Klein holography machinery [ref] to this geometry and extract from the asymptotic expansion of the supergravity fields the correlation functions with chiral primary operators and the stress tensor (see also [ref] ).

    Wilson loop correlators at strong coupling: from matrices to bubbling geometries · Outline of the paper · 0.99

  • Using the techniques of homotopy transfer[See [ref] for introductions and applications of homotopy transfer.] and the perturbation lemma and employing the results of [ref] , we will give an algorithm to compute the gauge invariant field variables to any order in perturbation theory: Φ = p_1(Φ) + 1/2 p_2(Φ, Φ) +1/3! p_3(Φ, Φ,Φ) + ⋯ . which generalizes the first order and second order results of [ref] .

    Homotopy transfer for massive Kaluza-Klein modes · Introduction · 0.88

  • Here we follow instead the gauge-invariant KK reduction method developed in [ref] .

    Supercharged AdS${}_3$ Holography · Gauge-invariant combinations of supergravity fields · 1.00

Uses its data or values 2 papers
Compares with it 1 paper
Cites it as support 1 paper
  • The quadratic terms were added in order to ensure consistency with the fact that in the trace basis, extremal three-point correlators are non-zero, and they factorize into a product of two-point functions [ref] .

    Precision holography of AdS$_5$ bubbling geometries · Holographic dictionary in the single-trace basis · 0.97

Cites it as background 12 papers

Discussion

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