The occurrence of phase fluctuations due to thermal excitations in Bose-Einstein condensates (BECs) is studied for a variety of temperatures and trap geometries. We observe the statistical nature of the appearance of phase fluctuations and characterize the dependence of their average value on temperature, number of particles, and the trapping potential. We find pronounced phase fluctuations for...

Each topic will be introduced by a motivational or tutorial talk on a selected scientific achievement, in such a way that all participants can gain a broader sense of the benefits of the various approaches described. Basic information on the complementary properties of the different types of techniques, their data interpretation, as well as information on recent applications and developments wi...

Pablo Balenzuela, Holger Braun and Dante R. Chialvo ∗ Departamento de F́ısica, Facultad de Ciencias Exactas y Naturales, Universidad de Buenos Aires, Buenos Aires, Argentina; Consejo Nacional de Investigaciones Cient́ıficas y Tecnológicas (CONICET), Buenos Aires, Argentina; Department of Physiology, David Geffen School of Medicine, UCLA, Los Angeles, CA, USA; Facultad de Ciencias Médicas, Univers...

A class of Einstein-dilaton-axion models is found for which almost all flat expanding homogeneous and isotropic universes undergo recurrent periods of acceleration. We also extend recent results on eternally accelerating open universes.

A number of new papers have greatly elucidated the derivation of quiver gauge theories from D-branes at a singularity. A complete story has now been developed for the total space of the canonical line bundle over a smooth Fano 2-fold. In the context of the AdS/CFT conjecture, this corresponds to eight of the ten regular Sasaki-Einstein 5-folds. Interestingly, the two remaining spaces are among ...