Hydrodynamics has been recently reformulated as an effective field theory based on an underlying Schwinger-Keldysh path integral. After a pedagogical introduction to the formalism, I will show how effective actions of this type can be derived from holography using a mixed signature bulk spacetime whereby an eternal asymptotically anti-de Sitter black hole is glued to its Euclidean counterpart along an initial time slice in a way to match the desired double-time contour of the dual field theory. For concreteness, I will consider the example of dissipative low-energy dynamics of relativistic charged matter at strong coupling in a fixed thermal background.

A very active field of research in the context of one-dimensional many-body quantum systems is the study of their out-of-equilibrium dynamics. This means mainly trying to answer the question: How can we compute or even define quantum averages of local observables in an out-of-equilibrium system?

In my talk I will provide a small review of the main answers to this question and then focus on a particular example that we have recently studied, namely a mass quench of the Ising field theory (e.g. a sudden change of the mass scale). Here, in particular, we asked the question of what the time-evolution of entanglement is after such a quench. Because of the model's simplicity we were able to obtain analytic results which are often inaccessible for other models. However, even if the results are model-dependent, some of the features we observe (such as oscillations) appear to be rather universal and suggest a close relationship between the dynamics of entanglement and the dynamics of local observables, two problems that are often looked at quite separately.

In this talk, I will discuss problems in soliton-antisoliton scattering in non-integrable models, using ${\varphi }^4$ theory in (1+1) dimensions as an example. Then, I shall describe some recent progress in the field. Concretely, I will 1) construct a modified theory where the solitons in the scattering process interact exclusively via their internal modes (no intersoliton static force) and 2) present a method to construct a moduli space for soliton scattering. These results may provide important instruments for a systematic analysis of non-integrable processes in many solitonic models.

In this seminar, minimal surfaces with mixed flux will be presented. Firstly, minimal surfaces in Euclidean ${\mathrm{AdS}}_5\times S^5$ and their connection with the classical integrable structure of the setting will be presented. Then, minimal surfaces with mixed flux in Euclidean ${\mathrm{AdS}}_3$ will be put forward. It will be shown how they are represented by solutions to an integrable mechanical system, in which the pure Neveu-Schwarz-Neveu-Schwarz limit is displayed as a simplification of the solutions. Finally, the spectral curve picture will be commented, where the previous limit will be reproduced by a degeneration of the elliptic surface.

The application of the magnetron sputtering methodology will be presented for the “bottom-up” fabrication of thin films of different nature (Si and Co) containing closed nanopores filled with the process gas (He). In these nanobubbles (2-40nm) we have determined ultra-high pressures and densities of the gas stabilized in a condensed state inside the nanopores. The new manufacturing tool works with conventional sputtering equipment and moderate power conditions. It allows the growth of homogeneous films, the selection of different matrix-gas combinations, the use of flexible substrates or the manufacture of multilayers or self-supported layers. The presented research aims to develop these materials and their applications taking advantage of two fundamental aspects:

• i) The large amount of gas trapped in nanobubbles (up to 35% of He in a silicon film) and its stability;
• ii) the nanocomposite nature of the material and the effects on the nanoporous matrix.

Alessandro Torrielli (University of Surrey, UK) will visit IGFAE during the third and fourth week of September, and he will give a series of lectures from the 16th to the 20th of September. For more information, please see the website https://indico.cern.ch/event/828305/, or contact Riccardo Borsato (riccardo.borsato@usc.es).

Charm decays provide an unique laboratory to probe for physics beyond the Standard Model and also for the study of long distance effects of strong interactions. Recent measurements by the LHCb Collaboration are presented: the first observation of CPV in neutral charm-mesons, a search for CPV in Cabibbo-suppressed two-body decays of charged charm-mesons and the first amplitude analysis of the decay $D^{\mathrm{+}}\to K^{\mathrm{-}}{K}^{\mathrm{+}}{K}^{\mathrm{+}}$. Prospects for searches for CPV in three-body decays of charged charm-mesons are also discussed.