Cooling Dynamics of Ultracold Two-Species Fermi-Bose Mixtures
Abstract
We compare strategies for evaporative and sympathetic cooling of two-species Fermi-Bose mixtures in single-color and two-color optical dipole traps. We show that in the latter case a large heat capacity of the bosonic species can be maintained during the entire cooling process. This could allow one to efficiently achieve a deep Fermi degeneracy regime having at the same time a significant thermal fraction for the Bose gas, crucial for a precise thermometry of the mixture. Two possible signatures of a superfluid phase transition for the Fermi species are discussed.
- Publication:
-
Physical Review Letters
- Pub Date:
- January 2003
- DOI:
- 10.1103/PhysRevLett.90.030404
- arXiv:
- arXiv:cond-mat/0301517
- Bibcode:
- 2003PhRvL..90c0404P
- Keywords:
-
- 05.30.Fk;
- 32.80.Pj;
- 67.57.-z;
- 67.60.-g;
- Fermion systems and electron gas;
- Optical cooling of atoms;
- trapping;
- Superfluid phase of liquid <sup>3</sup>He;
- Mixed systems;
- liquid <sup>3</sup>He <sup>4</sup>He mixtures;
- Condensed Matter
- E-Print:
- 4 pages, 3 figures