First person – Juan Garrido-Maraver

First Person is a series of interviews with the first authors of a selection of papers published in Biology Open, helping early-career researchers promote themselves alongside their papers. Juan Garrido-Maraver is first author on 'Forcing contacts between mitochondria and the endoplasmic reticulum extends lifespan in a Drosophila model of Alzheimer's disease', published in BiO. Juan conducted the research described in this article while a postdoctoral scientist in L. Miguel Martins's lab at the MRC Toxicology Unit, University of Cambridge, Leicester, UK. He is now a postdoctoral scientist in the lab of Alvaro A. Tavares at the Centre for Biomedical Research (CBMR), University of Algarve, Faro, Portugal, investigating molecular mechanisms linked to human diseases from a therapeutic point of view.info:eu-repo/semantics/publishedVersio

PT-symmetric sine-Gordon breathers

In this work, we explore a prototypical example of a genuine continuum breather (i.e., not a standing wave) and the conditions under which it can persist in a $\mathcal{P T}$-symmetric medium. As our model of interest, we will explore the sine-Gordon equation in the presence of a $\mathcal{P T}$- symmetric perturbation. Our main finding is that the breather of the sine-Gordon model will only persist at the interface between gain and loss that $\mathcal{P T}$-symmetry imposes but will not be preserved if centered at the lossy or at the gain side. The latter dynamics is found to be interesting in its own right giving rise to kink-antikink pairs on the gain side and complete decay of the breather on the lossy side. Lastly, the stability of the breathers centered at the interface is studied. As may be anticipated on the basis of their "delicate" existence properties such breathers are found to be destabilized through a Hopf bifurcation in the corresponding Floquet analysis

Propagation studies for the construction of atomic macro-coherence in dense media as a tool to investigate neutrino physics

In this manuscript we review the possibility of inducing large coherence in a macroscopic dense target by using adiabatic techniques. For this purpose we investigate the degradation of the laser pulse through propagation, which was also related to the size of the prepared medium. Our results show that, although adiabatic techniques offer the best alternative in terms of stability against experimental parameters, for very dense media it is necessary to engineer laser-matter interaction in order to minimize laser field degradation. This work has been triggered by the proposal of a new technique, namely Radiative Emission of Neutrino Pairs (RENP), capable of investigating neutrino physics through quantum optics concepts which require the preparation of a macrocoherent state.Comment: 10 pages, 10 figure

Generation of entangled photon pairs in optical cavity-QED: Operating in the bad cavity limit

We propose an optical cavity-QED scheme for the deterministic generation of polarization entangled photon pairs that operates with high fidelity even in the bad cavity limit. The scheme is based on the interaction of an excited four-level atom with two empty optical cavity modes via an adiabatic passage process. Monte-Carlo wave function simulations are used to evaluate the fidelity of the cavity-QED source and its entanglement capability in the presence of decoherence. In the bad cavity limit, fidelities close to one are predicted for state-of-the-art experimental parameter values.Comment: 9 pages and 5 figure

La irracionalidad de la política criminal europea

Desde hace años la Unión Europea ha venido legislando respecto a asuntos penales, en un principio a través de Decisiones marco en el ámbito del tercer pilar. Desde el Tratado de Lisboa la UE tiene reconocidas competencias para definir los tipos penales y las penas en algunos ámbitos (art. 83), armonizando las legislaciones de los estados miembros ahora a través de directivas. Este trabajo pretende analizar por tanto la actual política criminal llevada a cabo por la Unión Europea, atendiendo a sus déficits e irracionalidades. Es indudable la importancia de dicho análisis dada la influencia que la legislación comunitaria desempeña actualmente sobre las políticas criminales nacionales.Universidad de Málaga. Campus de Excelencia Internacional Andalucia Tech

An energy-based stability criterion for solitary traveling waves in Hamiltonian lattices

In this work, we revisit a criterion, originally proposed in [Nonlinearity {\bf 17}, 207 (2004)], for the stability of solitary traveling waves in Hamiltonian, infinite-dimensional lattice dynamical systems. We discuss the implications of this criterion from the point of view of stability theory, both at the level of the spectral analysis of the advance-delay differential equations in the co-traveling frame, as well as at that of the Floquet problem arising when considering the traveling wave as a periodic orbit modulo a shift. We establish the correspondence of these perspectives for the pertinent eigenvalue and Floquet multiplier and provide explicit expressions for their dependence on the velocity of the traveling wave in the vicinity of the critical point. Numerical results are used to corroborate the relevant predictions in two different models, where the stability may change twice. Some extensions, generalizations and future directions of this investigation are also discussed