REVIEW
Anti-de Sitter Black Holes, Thermal Phase Transition and Holography in Higher Curvature Gravity
High Energy Physics - Theory · Submitted 21 Feb 2002 · 55 references
Pith's verdict: The Gauss-Bonnet half is solid and the Wald/first-law entropy check is genuinely useful; the (Riemann)² k=-1 transition is an extrapolation of a first-order expansion at coupling O(1), and the abstract misstates two of its own results.
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Referee report
The paper
The paper claims
The paper argues that higher-curvature terms can allow a Hawking-Page thermal phase transition for anti-de Sitter black holes with hyperbolic horizons, a case forbidden in Einstein gravity.
The reading
What carries the argument
The argument is carried by the sign of the regularized Euclidean free energy, $F=I_E/beta$, measured relative to thermal AdS with $F=0$. The Hawking temperature comes from the periodicity of imaginary time, $T=(e^{2varphi})'|_{r_H}/4pi$, and a phase transition occurs when $F$ changes sign as $r_H$ varies: $F>0$ favors thermal AdS, $F<0$ favors the black hole. For Gauss-Bonnet the authors use the exact solution $e^{2varphi}=k+r^2/(2hatalpha)+epsilon r^2/(2hatalpha)[1-4hatalpha/ell^2(1-hatalpha/ell^2)+4hatalpha m/r^d]^{1/2}$ and derive $F$, $T$, and $S$; for $(Riemann)^2$ they use a first-order perturbative metric and free energy. Entropy is cross-checked with the Noether-charge formula $tilde S=(4pi/kappa_{d+1})int d^{d-1}xsqrt{h}[1+2alphakappa_{d+1}R(h)]$ for Gauss-Bonnet and its higher-curvature generalization for $(Riemann)^2$.
Extended reading notes
Core claim
The paper's central result is that higher-curvature interactions change the phase structure of anti-de Sitter black holes. In Einstein gravity only $k=1$ horizons show a Hawking-Page transition; with the Gauss-Bonnet combination the authors find an exact branch where the $k=-1$ free energy can be positive for a range of horizon radii and negative for large radii, opening a first-order transition between a small topological black hole and thermal AdS. In the $(Riemann)^2$ theory, treated perturbatively to first order in $hatgamma$, a spherical horizon can show the transition only when $hatgamma/L^2 < 1/42$, which the authors translate as $N>5$, while a hyperbolic horizon requires $hatgamma/L^2>1/2$, a large-coupling regime that does not give a physical bound on $N$. The paper also shows that the Gauss-Bonnet entropy from the first law coincides with the Wald entropy for an arbitrary cosmological term, and that the $(Riemann)^2$ entropy agrees with Wald's formula in the large-horizon limit.
Load-bearing premise
For the $(Riemann)^2$ half of the claim, the load-bearing premise is that the first-order perturbative free energy remains reliable in the regime where the hyperbolic free energy turns positive, even though that regime requires $hatgamma/L^2>1/2$, an $O(1)$ coupling outside the perturbative expansion.
Editorial extensions
If this is right
- A $k=-1$ Hawking-Page transition would let thermal AdS/CFT be studied on a hyperbolic boundary, not only on $S^{d-1}times S^1$.
- The $N>5$ threshold in $(Riemann)^2$ gravity makes the transition a finite-$N$ effect, so the free-energy density should carry subleading $1/N$ terms beyond the Einstein result.
- If the Gauss-Bonnet entropy identity holds for arbitrary $Lambda$, the area law is replaced by a horizon-curvature correction fixed by the first law and Noether charge, not by the horizon area alone.
- The brane-world translation gives FRW equations in which the induced matter is not radiation-like when $gammatilde=0$ is violated, so the holographic entropy comparison can be phrased as a bound on brane matter.
Reading between the lines
- If the hyperbolic transition survives at second order in $hatgamma$, it would be a clean finite-coupling test for a dual CFT on a hyperbolic boundary; a thermal CFT on $H^3times S^1$ should show a corresponding confinement-like jump.
- The paper's $N>5$ condition is a statement about the sign of a coefficient in a $1/N$ expansion; comparing it with the known $N=2$ $Sp(N)$ free energy at weak coupling could turn the threshold into a quantitative check rather than a sign test.
- The abstract/text entropy-inequality mismatch suggests recalculating $S_H-S_{BH}$ for all $k$; the sign may depend on whether one uses the horizon radius or the brane radius in the Hubble formula.
- Because the $k=-1$ $(Riemann)^2$ window needs $hatgamma/L^2>1/2$, a natural extension is to solve the full theory numerically and see whether the window is an artifact of first-order truncation or a real strong-coupling phase.
Original abstract
We study anti-de Sitter black holes in the Einstein-Gauss-Bonnet and the generic R^2 gravity theories, evaluate different thermodynamic quantities, and also examine the possibilities of Hawking-Page type thermal phase transitions in these theories. In the Einstein theory, with a possible cosmological term, one observes a Hawking-Page phase transition only if the event horizon is a hypersurface of positive constant curvature (k=1). But, with the Gauss-Bonnet or/and the (Riemann)^2 interaction terms, there may occur a similar phase transition for a horizon of negative constant curvature (k=-1). We examine the finite coupling effects, and find that N>5 could trigger a Hawking-Page phase transition in the latter theory. For the Gauss-Bonnet black holes, one relates the entropy of the black hole to a variation of the geometric property of the horizon based on first law and Noether charge. With (Riemann)^2 term, however, we can do this only approximately, and the two results agree when, r_H>>L, the size of the horizon is much bigger than the AdS curvature scale. We establish some relations between bulk data associated with the AdS black hole and boundary data defined on the horizon of the AdS geometry. Following a heuristic approach, we estimate the difference between Hubble entropy {\cal S}_H and Bekenstein-Hawking entropy {\cal S}_{BH} with (Riemann)^2 term, which, for k=0 and k=-1, would imply {\cal S}_{BH}\leq {\cal S}_H.
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 study anti-de Sitter black holes in the Einstein-Gauss-Bonnet and the generic R^2 gravity theories, evaluate different thermodynamic quantities, and also examine the possibilities of Hawking-Page type thermal phase transitions in these theories. In the Einstein theory, with a possible cosmological term, one observes a Hawking-Page phase transition only if the event horizon is a hypersurface of positive constant curvature (k=1). But, with the Gauss-Bonnet or/and the (Riemann)^2 interaction terms, there may occur a similar phase transition for a horizon of negative constant curvature (k=-1). We examine the finite coupling effects, and find that N>5 could trigger a Hawking-Page phase transition in the latter theory. For the Gauss-Bonnet black holes, one relates the entropy of the black hole to a variation of the geometric property of the horizon based on first law and Noether charge. With (Riemann)^2 term, however, we can do this only approximately, and the two results agree when, r_H>>L, the size of the horizon is much bigger than the AdS curvature scale. We establish some relations between bulk data associated with the AdS black hole and boundary data defined on the horizon of the AdS geometry. Following a heuristic approach, we estimate the difference between Hubble entropy {\cal S}_H and Bekenstein-Hawking entropy {\cal S}_{BH} with (Riemann)^2 term, which, for k=0 and k=-1, would imply {\cal S}_{BH}\leq {\cal S}_H.
background contribution method result interpretation main claim
| # | sentence | role | the authors' own work | states the main conclusion | strength |
|---|---|---|---|---|---|
| s0 | We study anti-de Sitter black holes in the Einstein-Gauss-Bonnet and the generic R^2 gravity theories, evaluate different thermodynamic quantities, and also examine the possibilities of Hawking-Page type thermal phase transitions in these theories. | contribution 1.00 | 0.95 | 0.10 | asserted 0.91 |
| s1 | In the Einstein theory, with a possible cosmological term, one observes a Hawking-Page phase transition only if the event horizon is a hypersurface of positive constant curvature (k=1). | background 0.95 | 0.15 | 0.08 | asserted 0.88 |
| s2 | But, with the Gauss-Bonnet or/and the (Riemann)^2 interaction terms, there may occur a similar phase transition for a horizon of negative constant curvature (k=-1). | result 0.96 | 0.38 | 0.30 | hedged possibility 1.00 |
| s3 | We examine the finite coupling effects, and find that N>5 could trigger a Hawking-Page phase transition in the latter theory. | result 0.99 | 0.94 | 0.19 | asserted 0.73 |
| s4 | For the Gauss-Bonnet black holes, one relates the entropy of the black hole to a variation of the geometric property of the horizon based on first law and Noether charge. | contribution 0.48 | 0.76 | 0.06 | asserted 1.00 |
| s5 | With (Riemann)^2 term, however, we can do this only approximately, and the two results agree when, r_H>>L, the size of the horizon is much bigger than the AdS curvature scale. | limitation 0.76 | 0.92 | 0.07 | asserted 0.80 |
| s6 | We establish some relations between bulk data associated with the AdS black hole and boundary data defined on the horizon of the AdS geometry. | contribution 0.84 | 0.92 | 0.08 | asserted 1.00 |
| s7 | Following a heuristic approach, we estimate the difference between Hubble entropy {\cal S}_H and Bekenstein-Hawking entropy {\cal S}_{BH} with (Riemann)^2 term, which, for k=0 and k=-1, would imply {\cal S}_{BH}\leq {\cal S}_H. | result 0.72 | 0.91 | 0.14 | hedged possibility 0.78 |
What was examined, and what was not
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References
How the literature uses it
35 arXiv papers cite this in 49 sentences
Papers citing it · 28 sentences without a confident label
Builds on it 1 paper
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We will build our results from the well studied cases of Reissner-Nördstrom anti-de Sitter black holes [ref] and Gauss-Bonnet black holes [ref] , and generalize to the Gauss-Bonnet-$F^4$ black hole.
Thermodynamics of the Maxwell-Gauss-Bonnet anti-de Sitter Black Hole with Higher Derivative Gauge Corrections · Introduction · 0.96
Uses its method or tool 1 paper
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Following the perturbative metric solution found in [ref] and the methods discussed in refs.
Entropy Bound and Causality Violation in Higher Curvature Gravity · Entropy Bound for (Riemann)$^2$ Gravity · 0.87
Compares with it 2 papers
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The expressions of mass (without the Casimir term) and entropy agree with previous results in the literature found by using a different approach [ref] , [ref] , [ref] , [ref] .
Black objects in the Einstein-Gauss-Bonnet theory with negative cosmological constant and the boundary counterterm method · Static solutions · 1.00
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Let us finally mention that the thermodynamic behavior of our black holes is qualitatively similar to the one observed for $D=5$ Gauss-Bonnet black holes [ref] [See also [ref] for the case of general quadratic gravity — the analysis becomes perturbative in that case though.].
Holographic studies of Einsteinian cubic gravity · Spherical boundary: Hawking-Page transitions · 0.99
Cites it as background 17 papers
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Exact solutions and thermodynamic properties of black objects in Gauss-Bonnet gravity ([ref]) were discussed in [ref] (see also [ref] ).
Viscosity Bound Violation in Higher Derivative Gravity · Black brane geometry and thermodynamics · 0.96
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Static AdS black hole solutions in EGB gravity denote GBAdS in this work, presenting a number of interesting features (see $e.g.$ [ref] , [ref] , [ref] and the references therein).
Thermodynamics of Gauss-Bonnet black holes revisited · Introduction · 0.83
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The EGB black holes in anti de Sitter and de Sitter spaces have been discussed separately in [ref] and [ref] .
Black holes in Einstein-Gauss-Bonnet gravity with a background of modified Chaplygin gas · Introduction · 0.97
Discussion
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