Critical Stability 2014

Session

Scaling and Universality + Atomic Systems

13 oct. 2014, 15:00

Santos, Brazil

Présidents de session

Scaling and Universality + Atomic Systems

• Mahir Hussein (University of Sao Paulo)

27. Few-body universality: from Efimov effect to super Efimov effect

Prof. Yusuke Nishida (Tokyo Institute of Technology)

13/10/2014 15:00

Physics is said to be universal when it emerges regardless of microscopic details. The most remarkable example is the Efimov effect, which predicts the emergence of an infinite tower of three-boson bound states in three dimensions with binding energies obeying the universal exponential scaling. In this talk, I will discuss our recent proposal for its condensed matter realization, namely, the...

32. Finite range effects in two-body and three-body interactions

Dr Servaas Kokkelmans (Eindhoven University of Technology)

13/10/2014 15:40

Efimov physics in ultracold gases is described very well by the universal scaling laws, based on the scattering length and van der Waals length. The first can be tuned magnetically via a Feshbach resonance, the second is constant and connected to the radial range of the potential. However, experimental hints at non-universal behavior, when going away from resonance, are quite badly understood....

31. Strongly-interacting few-fermion systems in a trap

Dr Christian Forssén (Chalmers University of Technology)

13/10/2014 17:00

Small open quantum systems are intensely studied in various fields of physics. The properties of such systems are profoundly affected by their environment, such as the continuum of decay channels. In spite of their specific features, they also display generic properties that are common to all weakly bound/unbound systems close to threshold. This implies that similar universal few- and...

13. Monte Carlo Simulations of the Unitary Bose Gas

Dr Maurizio Rossi (Università degli Studi di Padova)

13/10/2014 17:40

We investigate the zero-temperature properties of a diluted homogeneous Bose gas made of N particles interacting via a two-body square-well potential by performing Monte Carlo simulations. We tune the interaction strength to achieve arbitrary positive values of the scattering length and compute by Monte Carlo quadrature the energy per particle E/N and the condensate fraction N_0/N of this...