Autor: admin

A dense gas of atoms where the average interatomic distance is smaller than the wavelength of the photons emitted from the atoms exhibits strong dipolar interactions and collective dissipation. I will discuss the underlying many-body master equation, investigate the dynamics of excitation transport, analyze spectroscopic signatures stemming from coherent long-range interactions and collective dissipation and moreover explore the non-trivial topological phases appearing in this open quantum system. I will moreover show how lattice gases of alkaline-earth-metal atoms constitute a simple and versatile platform for the exploration of these many-body systems with long-range interactions.

Conferenciante: Dra. Beatriz Olmos Sánchez (Universidad de Nottingham).

Fecha/Hora: Jueves 7 de Abril 2016, 12:30.

Lugar: Aula de Física Computacional del Departamento de Electromagnetismo y Física de la Materia, Facultad de Ciencias.

Evolutionary and ecosystem dynamics are often treated as different processes, operating at separate timescales. However, empirical evidence reveals that rapid evolutionary changes in complex communities can feedback into ecological interactions; e.g. recent work shows that competing plant species can experience fast phenotypic diversification, giving rise to enhanced complementarity in the exploitation of resources and to enlarged ecosystem-level productivity. We present a simple theoretical and computational approach which integrates eco-evolutionary dynamics. It accounts for the emergence of rapid phenotypic diversification, and explains the enhancement of overall productivity with increasing biodiversity. Furthermore, it also explains the possibility of spontaneous emergence of neutral species, and makes non-trivial predictions for phenotypic change and ecological interactions in the long term.

Conferenciante: Paula Villa Martín

Fecha/Hora: Martes 26 de Enero de 2016 a las 12:30.

Lugar: Aula de Física Computacional del Departamento de Electromagnetismo y Física de la Materia, Facultad de Ciencias.