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arXiv · 1411.4634

A chromium dipolar Fermi sea

B. Naylor·A. Reigue·E. Maréchal·O. Gorceix·B. Laburthe-Tolra·L. Vernac
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Abstract

We report on the production of a degenerate Fermi gas of 53Cr atoms, polarized in the state F=9/2, m_F=-9/2, by sympathetic cooling with bosonic S=3, m_S=-3 52Cr atoms. We load in an optical dipole trap 3.10^4 53Cr atoms with 10^6 52Cr atoms. Despite this initial small number of fermionic atoms, we reach a final temperature of T=0.6 T_f (Fermi temperature), with up to 10^3 53Cr atoms. This surprisingly efficient evaporation stems from an inter-isotope scattering length |a_{BF}| = (85+/- 10) a_{Bohr} which is small enough to reduce evaporative losses of the fermionic isotope, but large enough to insure thermalization.

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B. Naylor, A. Reigue, E. Maréchal, O. Gorceix, B. Laburthe-Tolra, L. Vernac. 2014-11-14. A chromium dipolar Fermi sea. https://doi.org/10.1103/physreva.91.011603

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