A chromium dipolar Fermi sea

Abstract : We report on the production of a degenerate Fermi gas of 53Cr atoms, polarized in the stateF=9/2, mF = −9/2, by sympathetic cooling with bosonic S=3, mS = −3 52Cr atoms. We load inan optical dipole trap 30 000 53Cr atoms with one million 52Cr atoms. Despite this initial small numberof fermionic atoms, we reach a final temperature of T ≃ 0.6 × Tf (Fermi temperature), with upto thousand 53Cr atoms. This surprisingly efficient evaporation stems from an inter-isotope scatteringlength |aBF | = 85(±10) aB (Bohr radius) which is small enough to reduce evaporative losses of thefermionic isotope, but large enough to insure thermalization.
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Contributor : Olivier Gorceix <>
Submitted on : Tuesday, November 18, 2014 - 10:37:10 AM
Last modification on : Thursday, February 7, 2019 - 5:48:39 PM

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  • HAL Id : hal-01083844, version 1
  • ARXIV : 1411.4634

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B. Naylor, A. Reigue, E. Maréchal, O. Gorceix, B. Laburthe-Tolra, et al.. A chromium dipolar Fermi sea. Physical Review A, American Physical Society, 2015, 91, 91, pp.011603(R). ⟨hal-01083844⟩

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