Efficient demagnetization cooling of atoms and its limits
2014
Article
OS Lab
Demagnetization cooling relies on spin-orbit coupling that brings motional and spin degrees of freedom into thermal equilibrium. In the case of a gas, one has the advantage that the spin degree of freedom can be cooled very efficiently using optical pumping. We investigate demagnetization cooling of a chromium gas in a deep optical dipole trap over a large temperature range and reach high densities up to 5×10^19 m^−3. We study the loss mechanism under such extreme conditions and identify excited-state collisions as the main limiting process. We discuss that in some systems demagnetization cooling has a realistic potential of reaching degeneracy by optical cooling only.
Author(s): | Valentin Volchkov and Jahn Rührig and Tilman Pfau and Axel Griesmaier |
Journal: | Physical Review A |
Volume: | 89 |
Pages: | 043417 |
Year: | 2014 |
Month: | April |
Day: | 17 |
Publisher: | American Physical Society (APS) |
Department(s): | Optics and Sensing Laboratory |
Bibtex Type: | Article (article) |
Paper Type: | Journal |
DOI: | 10.1103/PhysRevA.89.043417 |
State: | Published |
BibTex @article{effdmg14, title = {Efficient demagnetization cooling of atoms and its limits}, author = {Volchkov, Valentin and R{\"u}hrig, Jahn and Pfau, Tilman and Griesmaier, Axel}, journal = {Physical Review A}, volume = {89}, pages = {043417}, publisher = {American Physical Society (APS)}, month = apr, year = {2014}, doi = {10.1103/PhysRevA.89.043417}, month_numeric = {4} } |