All Outputs (99)

Supersymmetric solitons in gauged N $$ \mathcal{N} $$ = 8 supergravity (2023)
Journal Article
Anabalón, A., Gallerati, A., Ross, S., & Trigiante, M. (2023). Supersymmetric solitons in gauged N $$ \mathcal{N} $$ = 8 supergravity. Journal of High Energy Physics, 2023(2), Article 55. https://doi.org/10.1007/jhep02%282023%29055

We consider soliton solutions in AdS4 with a flat slicing and Wilson loops around one cycle. We study the phase structure and find the ground state and identify supersymmetric solutions as a function of the Wilson loops. We work in the context of a s... Read More about Supersymmetric solitons in gauged N $$ \mathcal{N} $$ = 8 supergravity.

Cosmologies inside hyperbolic black holes (2022)
Journal Article
Ross, S. F. (2022). Cosmologies inside hyperbolic black holes. Journal of High Energy Physics, 2022(11), Article 168. https://doi.org/10.1007/jhep11%282022%29168

Models with closed FRW cosmologies on the worldvolume of a constant-tension brane inside a black hole provide an interesting setup for studying cosmology holographically. However, in more than two worldvolume dimensions, there are limitations on such... Read More about Cosmologies inside hyperbolic black holes.

Going beyond ER=EPR in the SYK model (2022)
Journal Article
Berkooz, M., Brukner, N., Ross, S. F., & Watanabe, M. (2022). Going beyond ER=EPR in the SYK model. Journal of High Energy Physics, 2022(8), Article 51. https://doi.org/10.1007/jhep08%282022%29051

We discuss generalizations of the TFD to a density matrix on the doubled Hilbert space. We suggest that a semiclassical wormhole corresponds to a certain class of such density matrices, and specify how they are constructed. Different semi-classical p... Read More about Going beyond ER=EPR in the SYK model.

Constraints on cosmologies inside black holes (2022)
Journal Article
Fallows, S., & Ross, S. F. (2022). Constraints on cosmologies inside black holes. Journal of High Energy Physics, 2022(5), Article 094. https://doi.org/10.1007/jhep05%282022%29094

We study the construction of holographic models with closed FRW cosmologies on the worldvolume of a constant-tension brane inside a Schwarzschild-AdS black hole. In dimensions d > 2, having a smooth Euclidean solution where the brane does not self-in... Read More about Constraints on cosmologies inside black holes.

Towards traversable wormholes from force-free plasmas (2022)
Journal Article
Iqbal, N., & Ross, S. F. (2022). Towards traversable wormholes from force-free plasmas. SciPost Physics, 12(3), Article 086. https://doi.org/10.21468/scipostphys.12.3.086

The near-horizon region of magnetically charged black holes can have very strong magnetic fields. A useful low-energy effective theory for fluctuations of the fields, coupled to electrically charged particles, is force-free electrodynamics. The low e... Read More about Towards traversable wormholes from force-free plasmas.

Islands and mixed states in closed universes (2021)
Journal Article
Fallows, S., & Ross, S. F. (2021). Islands and mixed states in closed universes. Journal of High Energy Physics, 2021(7), Article 22. https://doi.org/10.1007/jhep07%282021%29022

We investigate the appearance of islands when a closed universe with gravity is entangled with a non-gravitating quantum system. We use braneworlds in three-dimensional multiboundary wormhole geometries as a model to explore what happens when the non... Read More about Islands and mixed states in closed universes.

Supersymmetric solitons and a degeneracy of solutions in AdS/CFT (2021)
Journal Article
Anabalón, A., & Ross, S. F. (2021). Supersymmetric solitons and a degeneracy of solutions in AdS/CFT. Journal of High Energy Physics, 2021(7), https://doi.org/10.1007/jhep07%282021%29015

We study Lorentzian supersymmetric configurations in D = 4 and D = 5 gauged N = 2 supergravity. We show that there are smooth 1/2 BPS solutions which are asymptotically AdS4 and AdS5 with a planar boundary, a compact spacelike direction and with a Wi... Read More about Supersymmetric solitons and a degeneracy of solutions in AdS/CFT.

Making near-extremal wormholes traversable (2020)
Journal Article
Fallows, S., & Ross, S. F. (2020). Making near-extremal wormholes traversable. Journal of High Energy Physics, 2020(12), Article 44. https://doi.org/10.1007/jhep12%282020%29044

We construct a traversable wormhole from a charged AdS black hole by adding a coupling between the two boundary theories. We investigate how the effect of this deformation behaves in the extremal limit of the black hole. The black holes have finite e... Read More about Making near-extremal wormholes traversable.

Spin structures and baby universes (2020)
Journal Article
Balasubramanian, V., Kar, A., Ross, S. F., & Ugajin, T. (2020). Spin structures and baby universes. Journal of High Energy Physics, 2020(9), Article 192. https://doi.org/10.1007/jhep09%282020%29192

We extend a 2d topological model of the gravitational path integral to include sums over spin structure, corresponding to Neveu-Schwarz (NS) or Ramond (R) boundary conditions for fermions. This path integral corresponds to a correlator of boundary cr... Read More about Spin structures and baby universes.

Complexity and typical microstates (2019)
Journal Article
Ross, S. F. (2019). Complexity and typical microstates. Physical Review D, 100(6), Article 066014. https://doi.org/10.1103/physrevd.100.066014

Typical black hole microstates in AdS=CFT were recently conjectured to have a geometrical dual with a smooth horizon and a portion of a second asymptotic region. I consider the application of the holographic complexity conjectures to this geometry. T... Read More about Complexity and typical microstates.

Generalized Gibbs ensemble and the statistics of KdV charges in 2D CFT (2019)
Journal Article
Maloney, A., Ng, G. S., Ross, S. F., & Tsiares, I. (2019). Generalized Gibbs ensemble and the statistics of KdV charges in 2D CFT. Journal of High Energy Physics, 2019(3), Article 75. https://doi.org/10.1007/jhep03%282019%29075

Two-dimensional CFTs have an infinite set of commuting conserved charges, known as the quantum KdV charges. We study the Generalized Gibbs Ensemble with chemical potentials for these charges at high temperature. In a large central charge limit, the p... Read More about Generalized Gibbs ensemble and the statistics of KdV charges in 2D CFT.

Thermal correlation functions of KdV charges in 2D CFT (2019)
Journal Article
Maloney, A., Ng, G. S., Ross, S. F., & Tsiares, I. (2019). Thermal correlation functions of KdV charges in 2D CFT. Journal of High Energy Physics, 2019(2), Article 44. https://doi.org/10.1007/jhep02%282019%29044

Two dimensional CFTs have an infinite set of commuting conserved charges, known as the quantum KdV charges, built out of the stress tensor. We compute the thermal correlation functions of the these KdV charges on a circle. We show that these correlat... Read More about Thermal correlation functions of KdV charges in 2D CFT.

Complexity of the AdS soliton (2018)
Journal Article
Reynolds, A. P., & Ross, S. F. (2018). Complexity of the AdS soliton. Classical and Quantum Gravity, 35(9), Article 095006. https://doi.org/10.1088/1361-6382/aab32d

We consider the holographic complexity conjectures in the context of the AdS soliton, which is the holographic dual of the ground state of a field theory on a torus with antiperiodic boundary conditions for fermions on one cycle. The complexity is a... Read More about Complexity of the AdS soliton.

Entanglement shadows in LLM geometries (2017)
Journal Article
Balasubramanian, V., Lawrence, A., Rolph, A., & Ross, S. F. (2017). Entanglement shadows in LLM geometries. Journal of High Energy Physics, 2017(11), Article 159. https://doi.org/10.1007/jhep11%282017%29159

We find a new example of an asymptotically AdS5 × S5 geometry which has an entanglement shadow: that is, a region of spacetime which no Ryu-Takayanagi minimal surface enters. Our example is a particular case of the supersymmetric LLM geometries. Our... Read More about Entanglement shadows in LLM geometries.

Complexity in de Sitter space (2017)
Journal Article
Reynolds, A. P., & Ross, S. F. (2017). Complexity in de Sitter space. Classical and Quantum Gravity, 34(17), Article 175013. https://doi.org/10.1088/1361-6382/aa8122

We consider the holographic complexity conjectures for de-Sitter invariant states in a quantum field theory on de Sitter space, dual to asymptotically anti-de Sitter geometries with de Sitter boundaries. The bulk holographic duals include solutions w... Read More about Complexity in de Sitter space.

Tensor network models of multiboundary wormholes (2017)
Journal Article
Peach, A., & Ross, S. F. (2017). Tensor network models of multiboundary wormholes. Classical and Quantum Gravity, 34(10), Article 105011. https://doi.org/10.1088/1361-6382/aa6b0f

We study the entanglement structure of states dual to multiboundary wormhole geometries using tensor network models. Perfect and random tensor networks tiling the hyperbolic plane have been shown to provide good models of the entanglement structure i... Read More about Tensor network models of multiboundary wormholes.

Divergences in Holographic Complexity (2017)
Journal Article
Reynolds, A., & Ross, S. F. (2017). Divergences in Holographic Complexity. Classical and Quantum Gravity, 34(10), Article 105004. https://doi.org/10.1088/1361-6382/aa6925

We study the UV divergences in the action of the 'Wheeler-de Witt patch' in asymptotically AdS spacetimes, which has been conjectured to be dual to the computational complexity of the state of the dual field theory on a spatial slice of the boundary.... Read More about Divergences in Holographic Complexity.

Butterflies with Rotation and Charge (2016)
Journal Article
Reynolds, A., & Ross, S. (2016). Butterflies with Rotation and Charge. Classical and Quantum Gravity, 33(21), Article 215008. https://doi.org/10.1088/0264-9381/33/21/215008

We explore the butterfly effect for black holes with rotation or charge. We perturb rotating BTZ and charged black holes in 2 + 1 dimensions by adding a small perturbation on one asymptotic region, described by a shock wave in the spacetime, and expl... Read More about Butterflies with Rotation and Charge.

Holography on non-orientable surfaces (2016)
Journal Article
Maloney, A., & Ross, S. F. (2016). Holography on non-orientable surfaces. Classical and Quantum Gravity, 33(18), Article 185006. https://doi.org/10.1088/0264-9381/33/18/185006

We consider the holographic computation of two-dimensional conformal field theory partition functions on non-orientable surfaces. We classify the three dimensional geometries that give bulk saddle point contributions to the partition function, and fi... Read More about Holography on non-orientable surfaces.

Holographic partition functions and phases for higher genus Riemann surfaces (2016)
Journal Article
Maxfield, H., Ross, S. F., & Way, B. (2016). Holographic partition functions and phases for higher genus Riemann surfaces. Classical and Quantum Gravity, 33(12), Article 125018. https://doi.org/10.1088/0264-9381/33/12/125018

We describe a numerical method to compute the action of Euclidean saddle points for the partition function of a two-dimensional holographic CFT on a Riemann surface of arbitrary genus, with constant curvature metric. We explicitly evaluate the action... Read More about Holographic partition functions and phases for higher genus Riemann surfaces.