Ruprecht Karls Universit├Ąt Heidelberg

Experiments on three-component Fermi gases

Recently we managed to prepare a three-component degenerate Fermi gas of 6Li with 50000 atoms in each state at a temperature of 215 nK, which corresponds to T/TF=0.37.
We studied the collisional stability of the gas in the magnetic field range from 0 to 750 G and found a broad and pronounced loss feature at 130 G. At approximately 580 G the sample remains quite stable, with 1/e lifetimes exceeding 30 s.
a.) Magnetic field dependence of the remaining fraction of a three-state mixture
		b.) two-component mixture as a reference
		c.) scattering lengths in all possible channels
a.) Magnetic field dependence of the remaining fraction of a three-state mixture
b.) two-component mixture as a reference
c.) scattering lengths in all possible channels

For a more quantitative analysis we deduced the three-body loss coefficient K3 from lifetime measurements.
The new results are available at arXiv:0806.0587.


Webmaster:
EDV Abteilung