5 papers
Singularity formation in the Gross-Pitaevskii Equation and Collapse in BEC
A. V. Rybin, I. P. Vadeiko, G. G. Varzugin +1
We study a mechanism of collapse of the condensate wave function in the Gross-Pitaevskii theory with attractive interparticle interaction. We reformulate the Gross-Pitaevskii equat…
Coherent quantum oscillations in coupled traps with ultracold atoms
N. M. Bogoliubov, J. Timonen, M. B. Zvonarev
The dynamics of two traps with ultracold atoms and connected by Josephson type coupling, is shown to exhibit a transition from dispersive dynamics to localized coherent oscillation…
Singularity Formation and Collapse in the Attractive Gross-Pitaevskii Equation
A. V. Rybin, G. G. Varzugin, J. Timonen
A generic mechanism of collapse in the Gross-Pitaevskii equation with attractive interparticle interactions is gained by reformulating this equation as Newton's equation of motion…
Hierarchy of time scales and quasitrapping in the N-atom micromaser
Georgii Miroshnichenko, Andrei Rybin, Ilia Vadeiko +1
We study the dynamics of the reduced density matrix(RDM) of the field in the micromaser. The resonator is pumped by N-atomic clusters of two-level atoms. At each given instant ther…
Finite-temperature correlations in the trapped Bose gas
N. M. Bogoliubov, R. K. Bullough, V. S. Kapitonov +2
Previous functional integral methods for translationally invariant systems have been extended to the case of a confining trap potential. Essentially all finite-temperature properti…