Atomic gas
With atomic gas is referred gases from unbound atoms which under the chosen conditions ( temperature , pressure ) would not normally be gaseous, for example, metal -atoms. So there are neither ionized particles nor molecules .
When cooled to near absolute temperature zero, an atomic gas shows completely different properties than the classic one, i.e. H. without considering quantum physics , would be expected. There are clear differences between such an ultra-cold atomic gas made from fermions and one made from bosons :
- In ultra-cold atomic gases from bosons one can test fundamental statements of quantum statistics , one can carry out interference experiments with atomic Bose-Einstein condensates or one can produce atomic lasers .
- Ultracold atomic gases from fermions give the opportunity to simulate the behavior in superconductors and to study the physics of neutron stars .
Web links
- Jan Krieger: Zeeman slower and experiment control for the NaLi experiment. (PDF; 6.5 MB) Retrieved September 20, 2009 .
Individual evidence
- ^ Tilman Esslinger , Immanuel Bloch , Theodor W. Hänsch : Atomic laser: From Bose-Einstein condensates, coherent waves of matter can be decoupled. (PDF) Retrieved January 24, 2015 .
- ↑ Rainer Scharf: From ultra-cold quantum gases to hot plasmas ( Memento from February 17, 2010 in the Internet Archive ; PDF)