Jan Boruch
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View article: Modular-Invariant Random Matrix Theory and <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:mrow><mml:msub><mml:mrow><mml:mi>AdS</mml:mi></mml:mrow><mml:mrow><mml:mn>3</mml:mn></mml:mrow></mml:msub></mml:mrow></mml:math> Wormholes
Modular-Invariant Random Matrix Theory and Wormholes Open
We develop a nonperturbative definition of RMT2: a generalization of random matrix theory that is compatible with the symmetries of two-dimensional conformal field theory. Given any random matrix ensemble, its n-point spectral correlations…
View article: BPS and near-BPS black holes in AdS5 and their spectrum in $$ \mathcal{N} $$ = 4 SYM
BPS and near-BPS black holes in AdS5 and their spectrum in $$ \mathcal{N} $$ = 4 SYM Open
A bstract We study quantum corrections in the gravitational path integral around nearly 1/16-BPS black holes in asymptotically AdS 5 × S 5 space, dual to heavy states in 4D $$ \mathcal{N} $$ = 4 super Yang-Mills. The analysis provides a …
View article: Multicentered black hole saddles for supersymmetric indices
Multicentered black hole saddles for supersymmetric indices Open
The supersymmetric index in string theory can sometimes have a discontinuous integer-valued jump at co-dimension one surfaces in moduli space called walls of marginal stability. When the index counts black hole microstates, crossing such w…
View article: The gravitational index of 5d black holes and black strings
The gravitational index of 5d black holes and black strings Open
A bstract The supersymmetric index of 5 d black strings and spinning black holes in M-theory is related to that of 4 d black holes in type IIA supergravity when both theories are compactified on the same Calabi-Yau threefold. We find the f…
View article: The gravitational index of 5d black holes and black strings
The gravitational index of 5d black holes and black strings Open
A bstract The supersymmetric index of 5 d black strings and spinning black holes in M-theory is related to that of 4 d black holes in type IIA supergravity when both theories are compactified on the same Calabi-Yau threefold. We find the f…
View article: How the Hilbert space of two-sided black holes factorises
How the Hilbert space of two-sided black holes factorises Open
A bstract In AdS/CFT, two-sided black holes are described by states in the tensor product of two Hilbert spaces associated with the two asymptotic boundaries of the spacetime. Understanding how such a tensor product arises from the bulk pe…
View article: New forms of attraction: attractor saddles for the black hole index
New forms of attraction: attractor saddles for the black hole index Open
A bstract The count of microstates for supersymmetric black holes is typically obtained from a supersymmetric index in weakly-coupled string theory. We find the saddles in the gravitational path integral corresponding to this index in a ge…
View article: Modular-invariant random matrix theory and AdS${}_3$ wormholes
Modular-invariant random matrix theory and AdS${}_3$ wormholes Open
We develop a non-perturbative definition of RMT${}_2$: a generalization of random matrix theory that is compatible with the symmetries of two-dimensional conformal field theory. Given any random matrix ensemble, its $n$-point spectral corr…
View article: Constructing all BPS black hole microstates from the gravitational path integral
Constructing all BPS black hole microstates from the gravitational path integral Open
A bstract Understanding how to prepare and count black hole micro-states by using the gravitational path integral is one of the most important problems in quantum gravity. Nevertheless, a state-by-state count of black hole microstates is d…
View article: How the Hilbert space of two-sided black holes factorises
How the Hilbert space of two-sided black holes factorises Open
In AdS/CFT, two-sided black holes are described by states in the tensor product of two Hilbert spaces associated with the two asymptotic boundaries of the spacetime. Understanding how such a tensor product arises from the bulk perspective …
View article: Exploring supersymmetric wormholes in $$ \mathcal{N} $$ = 2 SYK with chords
Exploring supersymmetric wormholes in $$ \mathcal{N} $$ = 2 SYK with chords Open
A bstract A feature the $$ \mathcal{N} $$ = 2 supersymmetric Sachdev-Ye-Kitaev (SYK) model shares with extremal black holes is an exponentially large number of ground states that preserve supersymmetry. In fact, the dimension of the grou…
View article: New forms of attraction: Attractor saddles for the black hole index
New forms of attraction: Attractor saddles for the black hole index Open
The count of microstates for supersymmetric black holes is typically obtained from a supersymmetric index in weakly-coupled string theory. We find the saddles in the gravitational path integral corresponding to this index in a general theo…
View article: Exploring supersymmetric wormholes in $\cal{N} = 2$ SYK with chords
Exploring supersymmetric wormholes in $\cal{N} = 2$ SYK with chords Open
A feature the $\mathcal{N}=2$ supersymmetric Sachdev-Ye-Kitaev (SYK) model shares with extremal black holes is an exponentially large number of ground states that preserve supersymmetry. In fact, the dimension of the ground state subsector…
View article: Constructing all BPS black hole microstates from the gravitational path integral
Constructing all BPS black hole microstates from the gravitational path integral Open
Understanding how to prepare and count black hole micro-states by using the gravitational path integral is one of the most important problems in quantum gravity. Nevertheless, a state-by-state count of black hole microstates is difficult b…
View article: Erratum to: Holographic path-integral optimization
Erratum to: Holographic path-integral optimization Open
A correction to this paper has been published: https://doi.org/10.1007/JHEP07(2021)016
View article: BPS and near-BPS black holes in $AdS_5$ and their spectrum in $\mathcal{N}=4$ SYM
BPS and near-BPS black holes in $AdS_5$ and their spectrum in $\mathcal{N}=4$ SYM Open
We study quantum corrections in the gravitational path integral around nearly $1/16$-BPS black holes in asymptotically $AdS_5 \times S^5$ space, dual to heavy states in 4D $\mathcal{N}=4$ super Yang-Mills. The analysis provides a gravitati…
View article: Path integral optimization from Hartle-Hawking wave function
Path integral optimization from Hartle-Hawking wave function Open
We propose a gravity dual description of the path-integral optimization in\nconformal field theories arXiv:1703.00456, using Hartle-Hawking wave functions\nin anti-de Sitter spacetimes. We show that the maximization of the\nHartle-Hawking …