Bifurcations, stability, and mode evolution in segregated condensate mixtures
Quantum Gases
2017-09-21 v1
Abstract
We present new features of low energy Bogoliubov quasiparticle excitations of a two component Bose-Einstein condensate (TBEC) in quasi-2D geometry at zero temperature using Hartree-Fock-Bogoliubov (HFB). We, in particular, consider the TBECs of Cs~-Rb and Rb~-Rb, and show specific features in the low energy excitation spectrum as a function of the interaction strength. For Rb~-Rb TBEC, the appearance of a new zero energy mode is observed. Whereas for Cs~-Rb TBEC we report a bifurcation of the softened Kohn mode at the point of transition from miscible to immiscible domain. The lower energy mode, after the bifurcation, goes soft and becomes a new Goldstone mode of the system.
Keywords
Cite
@article{arxiv.1612.08798,
title = {Bifurcations, stability, and mode evolution in segregated condensate mixtures},
author = {Sukla Pal and Arko Roy and D. Angom},
journal= {arXiv preprint arXiv:1612.08798},
year = {2017}
}
Comments
The paper has 9 pages and 12 figures