Multi-step Bose–Einstein condensation of trapped ideal Bose gases

Multi-step Bose-Einstein Condensation of Trapped Ideal Bose Gases

The Phenomenon of multi-step Bose-Einstein condensation (BEC) of a finite number of non-interacting bosons in anisotropic traps has been demonstrated by studing the populations on eight subsets of states. The cusp in the specific heat is found to be associated with the crossover between subsets of states involving Bose functions gn(z) of different classes, as specified by their behaviour at z =...

Bose-Einstein condensation in trapped atomic gases.

Effective Action Approach to Bose-Einstein Condensation of Ideal Gases

We present a short review of how the effective action formalism, well known in relativistic quantum field theory, can be used to discuss Bose-Einstein condensation of non-relativistic gases. This method lends itself very naturally to an interpretation of Bose-Einstein condensation in terms of symmetry breaking. It also allows for the definition of a very elegant regularization technique involvi...

in trapped Bose gases

We study the dynamics of condensate formation in an inhomogeneous trapped Bose gas with a positive interatomic scattering length. We take into account both the nonequilibrium kinetics of the thermal cloud and the Hartree-Fock mean-field effects in the condensed and the noncondensed parts of the gas. We solve our equations numerically by assuming that the thermal component behaves ergodically an...

Laser Induced Condensation of Trapped Bosonic Gases

Laser cooling has led to spectacular results in recent years [1]. So far, however, it has not allowed to reach temperatures for which quantum statistics become important. In particular, evaporative cooling is used to obtain Bose-Einstein condensation of trapped gases [2]. Nevertheless, several groups are pursuing the challenging goal of condensation via all–optical means [3–5]. In traps of size...