Cooling of a Bose-Einstein Condensate by spin distillation
Quantum Gases
2015-12-16 v1
Abstract
We propose and experimentally demonstrate a new cooling mechanism leading to purification of a spinor Bose-Einstein Condensate (BEC). Our scheme starts with a BEC polarized in the lowest energy spin state. Spin excited states are thermally populated by lowering the single particle energy gap set by the magnetic field. Then these spin-excited thermal components are filtered out, which leads to an increase of the BEC fraction. We experimentally demonstrate such cooling for a spin 3 52Cr dipolar BEC. Our scheme should be applicable to Na or Rb, with perspective to reach temperatures below 1 nK.
Keywords
Cite
@article{arxiv.1505.05098,
title = {Cooling of a Bose-Einstein Condensate by spin distillation},
author = {Bruno Naylor and Etienne Marechal and John Huckans and Olivier Gorceix and Paolo Pedri and Laurent Vernac and Bruno Laburthe-Tolra},
journal= {arXiv preprint arXiv:1505.05098},
year = {2015}
}
Comments
4 figures