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Music for the holographic party
(Room 326, from 2018-03-21 13:30 to 2018-03-21 14:30)
Dear theoretical physicists: The last edition of the holographic party was nice but once again the phonons didn't come and there was no music. We all know whose fault it is. So my proposal for this year is simple: let's not invite Lorentz. He has his temper so we shouldn't be too explicit . From past experiences we know that this is a non-trivial task, however I must remark that this is an absolute must if we want to come close to something which indeed looks like a real party. Lately some people have been proposing a class of massive gravity holographic models which could do the job, I think we should try. It's about time.
Strong cosmic censorship in de Sitter space
(CFP Room - 326, from 2018-03-14 13:30 to 2018-03-14 14:30)
Recent work indicates that the strong cosmic censorship hypothesis is violated by nearly extremal Reissner-Nordstrom-de Sitter black holes. It was argued that perturbations of such a black hole decay sufficiently rapidly that the perturbed spacetime can be extended across the Cauchy horizon as a weak solution of the equations of motion. In this paper we consider the case of Kerr-de Sitter black holes. We find that, for any non-extremal value of the black hole parameters, there are quasinormal modes which decay sufficiently slowly to ensure that strong cosmic censorship is respected. Our analysis covers both scalar field and linearized gravitational perturbations.
Critical systems and conformal perturbation theory
(CFP Room - 326, from 2018-03-07 13:30 to 2018-03-07 14:30)
Statistical systems near a classical critical point have been intensively studied both from theoretical and experimental points of view. In particular, correlation functions are of relevance in comparing theoretical models with the experimental data of real systems. In order to compute physical quantities near a critical point one needs to know the model at the critical (conformal) point. In this line, recent progresses in the knowledge of conformal field theories, through the conformal bootstrap, give the hope to get some interesting results also outside of the critical point. In this talk I will review and clarify how, starting from the knowledge of the critical correlators, one can calculate in a safe way their behavior outside the critical point. The approach illustrated requires the model to be just scale invariant at the critical point. I will clarify the method by applying it to different kind of perturbations of the 2D and 3D Ising model, discussing their possible experimental applications and their relations with conformal bootstrap results.
Higher-Spin Theory
(Room 326, from 2017-12-06 13:30 to 2017-12-06 14:30)
Shailesh Lal from CFP
Magnetic Entanglement in Spin-1/2 XY Chain
(Room 326, from 2017-11-29 13:30 to 2017-11-29 14:30)
Somayyeh Nemati from CFUM
Bond-States as Ground States of Local Quantum Hamiltonians in a Lattice of Interacting Spins
(, from 2017-11-22 13:30 to 2017-11-22 14:30)
João Pedro dos Santos Pires from FCUP
Effective holographic models for QCD
(Room 326, from 2017-11-15 13:30 to 2017-11-15 14:30)
Alfonso Ballon Bayona from IFT-UNESP
The path towards a holographic color superconductor
(Room 326, from 2017-10-26 13:30 to 2017-10-26 14:30)
Javier Tarrio from ULB
Weight Shifting Operators and Conformal Blocks
(Room 326, from 2017-10-25 13:30 to 2017-10-25 14:30)
Denis Karateev from EPFL
(pseudo)symmetry breaking and holographic bad metals
(Room 326, from 2017-10-18 13:30 to 2017-10-18 14:30)
Daniele Musso from USC