Tomas Andrade (ICC, Barcelona U.) - Numerical Methods in General Relativity
Simulation of a black hole collision in 7D https://youtu.be/Ytqg9XX_4sM
Tlon, Uqbar, Orbis Tertius (Ficciones, 1944) JL Borges
Pablo Bueno (Balseiro Inst.) - Universality from holographic higher-curvature gravities
Damian Galante (King's College London) - Comments on de Sitter and Holography
Recommended Bibliography:
Les Houches lectures on de Sitter space (Spradlin, Strominger, Volovich)
De Sitter Musings (Anninos)
Gustavo J. Turiaci ( UC, Santa Barbara) - Euclidean wormholes in simple models of quantum gravity
Thiago Araujo: Crystal Melting and their avatars in the AdS3/CFT2 correspondence
Random partitions appear in a diverse range of problems arising in condensed matter systems, gauge theories, topological strings, and others. In the holographic setting, random partitions are associated with higher spins fields in the AdS3/CFT2 correspondence. In this talk, I will introduce recent developments of this problem, its integrable structures, and a recent conjecture (2005.09103 [hep-th]) relating plane partitions growth of a statistical system and the MacMahon representation of the affine Yangian algebra Y[Ă»(1)].
Daniel Avila: "Melting holographic mesons by cooling a magnetized quark-gluon plasma"
The AdS / CFT correspondence is a powerful tool for studying the non-perturbative properties of the quark-gluon plasma. We recently built a holographic model that considers flavor degrees of freedom and a very intense magnetic field like the one generated in non-central collisions. Our main results are related to the phenomenom of meson dissociation: in addition to the previously known critical temperature above which the mesons melt, we found that for certain magnetic field intensities there exists a second lower critical temperature, below which stable mesons cease to exist.
P. Marcos Crichigno: "Cardy-like formulas in 3d and 5d SCFTs and black hole entropy"
In this talk, I will show how thermodynamic properties of AdS black holes reveal universal properties of SCFTs which emerge at large N. These include new Cardy-like formulas for odd-dimensional SCFTs which are explicitly checked via non-perturbative techniques in field theory.
Nicolas Kovensky: "Holographic Quarkyonic Matter"
In this talk, I will discuss recent developments on the phase structure of the Witten-Sakai-Sugimoto model (focusing on a particular limit). I will present a novel configuration, allowing for baryons in the pointlike approximation to coexist with fundamental quarks. The resulting phase is a holographic realization of quarkyonic matter, which is predicted to occur in QCD at a large number of colors, and possibly plays a role in real-world QCD as well. Finally, I will show how the quark mass is introduced and how it affects the nature of the low temperature phase transitions.
Gabriel Nagaoka: "Supersymmetric Wilson loops and deformations"
In this talk, we will introduce supersymmetric Wilson loops and motivate their study in the broad context of the holographic principle. We will describe the construction of supersymmetric Wilson loops in ABJ(M) theory, presenting a general family of 1/6-BPS loops that enhance to 1/2-BPS. We will also discuss the wavy line deformations of supersymmetric loops and their relation to physical quantities such as the Bremsstrahlung function, naturally connecting to the defect CFT approach to Wilson operators.
Yaithd D. Olivas: "Holographic integral geometry with time dependence"
We write down Crofton formulas--expressions that compute lengths of spacelike curves in asymptotically AdS3 geometries as integrals over kinematic space which apply when the curve and/or the background spacetime is time-dependent. Relative to their static predecessor, the time-dependent Crofton formulas display several new features, whose origin is the local null rotation symmetry of the bulk geometry. In pure AdS3 where null rotations are global symmetries, the Crofton formulas simplify and become integrals over the null planes, which intersect the bulk curve.
Ignacio Reyes: "Quantum information for free fields"
Understanding quantum field theory from a quantum information perspective lies at the core of many recent developments in high energy physics. Yet very little is known beyond universality. However 1+1 free theories are surprisingly tractable via exact holomorphic methods. We review how this works and show how to obtain exact Renyi entropies, modular Hamiltonians and flows. Introducing moving mirrors allows to study in detail unitary Page curves that resemble those of black hole evaporation.
Felipe Rosso: "Solving Puzzles in Deformed JT Gravity: Phase Transitions and Non-Perturbative Effects"
Recent work has shown that certain deformations of the scalar potential in Jackiw-Teitelboim gravity can be written as double-scaled matrix models. However, some of the deformations exhibit an apparent breakdown of unitarity in the form of a negative spectral density at disc order. We show here that the source of the problem is the presence of a multi-valued solution of the leading order matrix model string equation. While for a class of deformations we fix the problem by identifying a first order phase transition, for others we show that the theory is both perturbatively and non-perturbatively inconsistent. Aspects of the phase structure of the deformations are mapped out, using methods known to supply a non-perturbative definition of undeformed JT gravity. Some features are in qualitative agreement with a semi-classical analysis of the phase structure of two-dimensional black holes in these deformed theories.