Classical quasiparticle dynamics and chaos in trapped Bose condensates

In the short wavelength limit the Bogoliubov quasiparticles of trapped Bose-Einstein condensates can be described as classical particles and antiparticles with dynamics in a mixed phase-space. For anisotropic parabolic traps we determine the location of the resonances and study the influence of the sharpness of the condensate surface on the appearance of chaos as the energy of the quasiparticles is lowered from values much larger than to values comparable with the chemical potential.Comment: 20 pages, 4 figure

Transforming Development? The Role of Philanthropic Foundations in International Development Cooperation

This study by an independent think tank in Germany takes a look at the role of philanthropic foundations on the international development scene