Por Bruno Mera (IST).
Abstract: The Uhlmann connection is a mixed state generalization of the Berry connection. The latter has a very important role in the study of topological phases at zero temperature. Closely related, the quantum fidelity is an information theoretical quantity which is a measure of distinguishability of quantum states. Moreover, it has been extensively used in the analysis of quantum phase transitions.
Por Giuseppe Buttazzo (Università di Pisa).
Por Nikolay Tzvetkov (Université de Cergy-Pontoise).
Por Michael Röckner (University of Bielefeld).
Por Jiří Lipovský (Department of Physics, Faculty of Science, University of Hradec Kralove).
Por Anna Barbieri (University of Sheffield).
Abstract: I will give a brief and gentle introduction through examples from quivers to Bridgeland stability conditions and wall-crossing formulae for invariants counting semistable objects. Such stability conditions are encoded in the formal notions of BPS structures or Kontsevich-Soibelman stability data. I will show how Riemann-Hilbert problems naturally appears in this context.
Por Davide Masoero (Grupo de Física Matemática da Universidade de Lisboa).
Por Loic Bourdin (University of Limoges, France).
Por Carlos Oliveira (Grupo de Física Matemática, Universidade de Lisboa).
Por T. Augusta Mesquita (Instituto Politécnico de Viana do Castelo).
