Not signed in

Want to take part in these discussions? Sign in if you have an account, or apply for one below

• Username
• Password
• Remember me

• Sign in using OpenID
• Remember me

• Forgot your password?
• Apply for membership

2-category 2-category-theory abelian-categories adjoint algebra algebraic algebraic-geometry algebraic-topology analysis analytic-geometry arithmetic arithmetic-geometry book bundles calculus categorical categories category category-theory chern-weil-theory cohesion cohesive-homotopy-type-theory cohomology colimits combinatorics complex complex-geometry computable-mathematics computer-science constructive cosmology deformation-theory descent diagrams differential differential-cohomology differential-equations differential-geometry digraphs duality elliptic-cohomology enriched fibration finite foundation foundations functional-analysis functor gauge-theory gebra geometric-quantization geometry graph graphs gravity grothendieck group group-theory harmonic-analysis higher higher-algebra higher-category-theory higher-differential-geometry higher-geometry higher-lie-theory higher-topos-theory homological homological-algebra homotopy homotopy-theory homotopy-type-theory index-theory integration integration-theory k-theory lie-theory limits linear linear-algebra locale localization logic mathematics measure-theory modal modal-logic model model-category-theory monad monads monoidal monoidal-category-theory morphism motives motivic-cohomology nlab noncommutative noncommutative-geometry number-theory of operads operator operator-algebra order-theory pages pasting philosophy physics pro-object probability probability-theory quantization quantum quantum-field quantum-field-theory quantum-mechanics quantum-physics quantum-theory question representation representation-theory riemannian-geometry scheme schemes set set-theory sheaf sheaves simplicial space spin-geometry stable-homotopy-theory stack string string-theory superalgebra supergeometry svg symplectic-geometry synthetic-differential-geometry terminology theory topology topos topos-theory tqft type type-theory universal variational-calculus

1. • CommentRowNumber1.
   • CommentAuthorUrs
   • CommentTimeJul 10th 2019
   • PermaLink
   Author: Urs
   Format: MarkdownItexa stub, for the moment just as to satisfy links <a href="https://ncatlab.org/nlab/revision/Jackiw-Teitelboim+gravity/1">v1</a>, <a href="https://ncatlab.org/nlab/show/Jackiw-Teitelboim+gravity">current</a>

   a stub, for the moment just as to satisfy links

   v1, current

2. • CommentRowNumber2.
   • CommentAuthorUrs
   • CommentTimeJul 10th 2019
   • (edited Jul 10th 2019)
   • PermaLink
   Author: Urs
   Format: MarkdownItexadded the following -- who would have thought we get to this point on our lifetime: *** JT-gravity gives a good approximation to the [[anti de Sitter spacetime|AdS]]-factor in the [[near horizon geometry]] $AdS_2\times S^2$ of near-[[extremal black holes]] in $\geq 4$-dimensional spacetime ([NSST18](#NSST18), [MTV18](#MTV18)). Via the [[AdS/CFT]]-dual of JT-gravity given by [[random matrix theory]] ([Stanford-Witten 19](#StanfordWitten19)) this allows to compute genuine [[quantum gravity]]-aspects of near-[[extremal black holes]], such as notably their microscopic [[black hole entropy]]. Computations are now under way... Notice that near-[[extremal black holes]] have been observed in nature, by the Chandra telescope [see eg here](https://scitechdaily.com/chandra-views-spinning-black-holes-across-cosmic-sea/). <a href="https://ncatlab.org/nlab/revision/diff/Jackiw-Teitelboim+gravity/2">diff</a>, <a href="https://ncatlab.org/nlab/revision/Jackiw-Teitelboim+gravity/2">v2</a>, <a href="https://ncatlab.org/nlab/show/Jackiw-Teitelboim+gravity">current</a>

   added the following – who would have thought we get to this point on our lifetime:

   ---

   JT-gravity gives a good approximation to the AdS-factor in the near horizon geometry $AdS_2\times S^2$ of near-extremal black holes in $\geq 4$-dimensional spacetime (NSST18, MTV18).

   Via the AdS/CFT-dual of JT-gravity given by random matrix theory (Stanford-Witten 19) this allows to compute genuine quantum gravity-aspects of near-extremal black holes, such as notably their microscopic black hole entropy. Computations are now under way…

   Notice that near-extremal black holes have been observed in nature, by the Chandra telescope see eg here.

   diff, v2, current

3. • CommentRowNumber3.
   • CommentAuthorUrs
   • CommentTimeNov 27th 2019
   • PermaLink
   Author: Urs
   Format: MarkdownItexadded pointer to today's * Andreas Blommaert, Thomas G. Mertens, Henri Verschelde, _Eigenbranes in Jackiw-Teitelboim gravity_ ([arXiv:1911.11603](https://arxiv.org/abs/1911.11603)) <a href="https://ncatlab.org/nlab/revision/diff/Jackiw-Teitelboim+gravity/5">diff</a>, <a href="https://ncatlab.org/nlab/revision/Jackiw-Teitelboim+gravity/5">v5</a>, <a href="https://ncatlab.org/nlab/show/Jackiw-Teitelboim+gravity">current</a>

   added pointer to today’s

   • Andreas Blommaert, Thomas G. Mertens, Henri Verschelde, Eigenbranes in Jackiw-Teitelboim gravity (arXiv:1911.11603)

   diff, v5, current

4. • CommentRowNumber4.
   • CommentAuthornLab edit announcer
   • CommentTimeNov 29th 2019
   • PermaLink
   Author: nLab edit announcer
   Format: MarkdownItexadded this pointer: Realization of [[JT-gravity]] as [[Kaluza-Klein reduction]] of [[D=6 supergravity]] on the [[worldvolume]] of [[D1-D5 brane bound states]] or [[M2-M5 brane bound states]]: * Yue-Zhou Li, Shou-Long Li, H. Lu, _Exact Embeddings of JT Gravity in Strings and M-theory_, Eur. Phys. J. C (2018) 78: 791 ([arXiv:1804.09742](https://arxiv.org/abs/1804.09742)) Anonymous <a href="https://ncatlab.org/nlab/revision/diff/Jackiw-Teitelboim+gravity/6">diff</a>, <a href="https://ncatlab.org/nlab/revision/Jackiw-Teitelboim+gravity/6">v6</a>, <a href="https://ncatlab.org/nlab/show/Jackiw-Teitelboim+gravity">current</a>

   added this pointer:

   Realization of JT-gravity as Kaluza-Klein reduction of D=6 supergravity on the worldvolume of D1-D5 brane bound states or M2-M5 brane bound states:

   • Yue-Zhou Li, Shou-Long Li, H. Lu, Exact Embeddings of JT Gravity in Strings and M-theory, Eur. Phys. J. C (2018) 78: 791 (arXiv:1804.09742)

   Anonymous

   diff, v6, current

5. • CommentRowNumber5.
   • CommentAuthorUrs
   • CommentTimeNov 29th 2019
   • (edited Nov 29th 2019)
   • PermaLink
   Author: Urs
   Format: MarkdownItexalso this one: * Iosif Bena, Pierre Heidmann, David Turton, _$AdS_2$ Holography: Mind the Cap_, JHEP 1812 (2018) 028 ([arXiv:1806.02834](https://arxiv.org/abs/1806.02834)) <a href="https://ncatlab.org/nlab/revision/diff/Jackiw-Teitelboim+gravity/7">diff</a>, <a href="https://ncatlab.org/nlab/revision/Jackiw-Teitelboim+gravity/7">v7</a>, <a href="https://ncatlab.org/nlab/show/Jackiw-Teitelboim+gravity">current</a>

   also this one:

   • Iosif Bena, Pierre Heidmann, David Turton, $AdS_2$ Holography: Mind the Cap, JHEP 1812 (2018) 028 (arXiv:1806.02834)

   diff, v7, current

6. • CommentRowNumber6.
   • CommentAuthorUrs
   • CommentTimeJan 26th 2020
   • PermaLink
   Author: Urs
   Format: MarkdownItexadded pointer to * Junho Hong, [[Niall Macpherson]], Leopoldo A. Pando Zayas, _Aspects of $AdS_2$ classification in M-theory: Solutions with mesonic and baryonic charges_, JHEP 11 (2019) 127 ([arXiv:1908.08518](https://arxiv.org/abs/1908.08518)) <a href="https://ncatlab.org/nlab/revision/diff/Jackiw-Teitelboim+gravity/10">diff</a>, <a href="https://ncatlab.org/nlab/revision/Jackiw-Teitelboim+gravity/10">v10</a>, <a href="https://ncatlab.org/nlab/show/Jackiw-Teitelboim+gravity">current</a>

   added pointer to

   • Junho Hong, Niall Macpherson, Leopoldo A. Pando Zayas, Aspects of $AdS_2$ classification in M-theory: Solutions with mesonic and baryonic charges, JHEP 11 (2019) 127 (arXiv:1908.08518)

   diff, v10, current

7. • CommentRowNumber7.
   • CommentAuthorUrs
   • CommentTimeJan 26th 2020
   • PermaLink
   Author: Urs
   Format: MarkdownItexalso pointer to * [[Giuseppe Dibitetto]], [[Nicolò Petri]], _$AdS_2$ solutions and their massive IIA origin_, JHEP 05 (2019) 107 ([arXiv:1811.11572](https://arxiv.org/abs/1811.11572)) <a href="https://ncatlab.org/nlab/revision/diff/Jackiw-Teitelboim+gravity/10">diff</a>, <a href="https://ncatlab.org/nlab/revision/Jackiw-Teitelboim+gravity/10">v10</a>, <a href="https://ncatlab.org/nlab/show/Jackiw-Teitelboim+gravity">current</a>

   also pointer to

   • Giuseppe Dibitetto, Nicolò Petri, $AdS_2$ solutions and their massive IIA origin, JHEP 05 (2019) 107 (arXiv:1811.11572)

   diff, v10, current

8. • CommentRowNumber8.
   • CommentAuthorUrs
   • CommentTimeApr 1st 2020
   • PermaLink
   Author: Urs
   Format: MarkdownItexadded pointer to today's * Wolfgang Wieland, _Twistor representation of Jackiw-Teitelboim gravity_ ([arXiv:2003.13887](https://arxiv.org/abs/2003.13887)) <a href="https://ncatlab.org/nlab/revision/diff/Jackiw-Teitelboim+gravity/11">diff</a>, <a href="https://ncatlab.org/nlab/revision/Jackiw-Teitelboim+gravity/11">v11</a>, <a href="https://ncatlab.org/nlab/show/Jackiw-Teitelboim+gravity">current</a>

   added pointer to today’s

   • Wolfgang Wieland, Twistor representation of Jackiw-Teitelboim gravity (arXiv:2003.13887)

   diff, v11, current

9. • CommentRowNumber9.
   • CommentAuthorUrs
   • CommentTimeJun 16th 2023
   • (edited Jun 16th 2023)
   • PermaLink
   Author: Urs
   Format: MarkdownItexadded pointer to this recent preprint: * Gustavo J. Turiaci, [[Edward Witten]], *$N=2$ JT Supergravity and Matrix Models* &lbrack;[arXiv:2305.19438](https://arxiv.org/abs/2305.19438)&rbrack; <a href="https://ncatlab.org/nlab/revision/diff/Jackiw-Teitelboim+gravity/13">diff</a>, <a href="https://ncatlab.org/nlab/revision/Jackiw-Teitelboim+gravity/13">v13</a>, <a href="https://ncatlab.org/nlab/show/Jackiw-Teitelboim+gravity">current</a>

   added pointer to this recent preprint:

   • Gustavo J. Turiaci, Edward Witten, $N=2$ JT Supergravity and Matrix Models [arXiv:2305.19438]

   diff, v13, current