Facilitated by Henrique Carvalho (LIP).

More info TBA

The relativistic viscous hydrodynamic description of the quark-gluon plasma by Müller-Israel-Stewart formulations has been very successful, but despite this success, these theories present limitations regarding well-posedness and causality. In recent years, a well-behaved version of the relativistic Navier-Stokes equations has been formulated, appearing as a promising alternative in which those limitations are absent. Using this novel theory, we perform numerical simulations of a quark-gluon plasma fluid that we use to describe experimental data on the transverse momentum distribution of hadrons from central Pb–Pb collisions measured at the LHC.

Recent years have seen a surge of interest in developing measures of complexity for the unitary evolution in quantum mechanics. One approach, known as Nielsen complexity, visualizes the evolution as a continuous "program" executed by the system and applies measures developed in computational complexity theory to judge whether the unitary evolution operators are simple or complex. Another approach, known as Krylov complexity, tracks how rapidly quantum states and operators spread over different independent directions as they evolve. One key question is whether these quantities are capable of distinguishing the evolution operators of solvable (simple) systems from generic (chaotic, complicated) ones. I will describe the challenges and achievements within this line of pursuit, as well as interrelations between the two apparently different approaches.

Seminar funded by La Caixa: fellowship from the ”la Caixa” Foundation (ID 100010434) with code LCF/BQ/PI24/120

Directors:

-Yassid Ayyad

-Beatriz Fernández Domínguez

Tribunal:

-Dr. Thomas Roger (GANIL-France) | Chair

-Dr. Miguel Ángel Benítez (Universidad de Huelva)

-Dr. Manuel Caamaño Fresco (IGFAE/USC)

I will describe recent results on applications of spread complexity to local quantum quenches in 2D CFTs. In particular, for holographic CFTs, I will discuss the relation between the rate of growth spread complexity and proper radial momentum in AdS.