Using modified Gaussian distribution to study the physical properties of one and two-component ultracold atoms
arXiv:cond-mat/0612508 · doi:10.1103/PhysRevA.75.023609
Abstract
Gaussian distribution is commonly used as a good approximation to study the trapped one-component Bose-condensed atoms with relatively small nonlinear effect. It is not adequate in dealing with the one-component system of large nonlinear effect, nor the two-component system where phase separation exists. We propose a modified Gaussian distribution which is more effective when dealing with the one-component system with relatively large nonlinear terms as well as the two-component system. The modified Gaussian is also used to study the breathing modes of the two-component system, which shows a drastic change in the mode dispersion at the occurrence of the phase separation. The results obtained are in agreement with other numerical results.
7 pages, 7 figures, accepted for publication in Phys. Rev. A
References in corpus (17)
- Vortices and Superfluidity in a Strongly Interacting Fermi Gas
- The dynamics of component separation in a binary mixture of Bose-Einstein condensates
- Pairing and Phase Separation in a Polarized Fermi Gas
- Fermionic Superfluidity with Imbalanced Spin Populations and the Quantum Phase Transition to the Normal State
- A quasi-pure Bose-Einstein condensate immersed in a Fermi sea
- Observation of the Pairing Gap in a Strongly Interacting Fermi Gas
- Creation of ultracold molecules from a Fermi gas of atoms
- Conversion of an Atomic Fermi Gas to a Long-Lived Molecular Bose Gas
- Two-species mixture of quantum degenerate Bose and Fermi gases
- Molecular Probe of Pairing in the BEC-BCS Crossover
- Strongly interacting Fermi gases with density imbalance
- Trapped fermions with density imbalance in the BEC limit
- Two-species magneto-optical trap with 40K and 87Rb
- Component separation in harmonically trapped boson-fermion mixtures
- Sympathetic cooling and collisional properties of a Rb-Cs mixture
- Longitudinal sound mode of a Bose-Einstein condensate in an optical lattice
- Oscillations of Bose condensates in a one-dimensional optical superlattice