Collective excitations of a trapped boson-fermion mixture across demixing

Details Collective excitations of a trapped boson-fermion mixture across demixing Collective excitations of a trapped boson-fermion mixture across demixing

2003-01-27

arxiv.org/abs/cond-mat/0301522v1

Phys. Rev. A 67, 053605 (2003)

Physics

Condensed Matter

revtex4, 9 pages, 8 postscript files

Scientific paper

10.1103/PhysRevA.67.053605

We calculate the spectrum of low-lying collective excitations in a mesoscopic cloud formed by a Bose-Einstein condensate and a spin-polarized Fermi gas as a function of the boson-fermion repulsions. The cloud is under isotropic harmonic confinement and its dynamics is treated in the collisional regime by using the equations of generalized hydrodynamics with inclusion of surface effects. For large numbers of bosons we find that, as the cloud moves towards spatial separation (demixing) with increasing boson-fermion coupling, the frequencies of a set of collective modes show a softening followed by a sharp upturn. This behavior permits a clear identification of the quantum phase transition. We propose a physical interpretation for the dynamical transition point in a confined mixture, leading to a simple analytical expression for its location.

Affiliated with

Also associated with

No associations

Rating

Collective excitations of a trapped boson-fermion mixture across demixing does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.

If you have personal experience with Collective excitations of a trapped boson-fermion mixture across demixing, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Collective excitations of a trapped boson-fermion mixture across demixing will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-412607