Production of a degenerate Fermi gas of metatsable helium-3 atoms

We give an overview of the experiments at the Laser Centre of the Vrije Universiteit in Amsterdam on ultracold gases of metastable helium-4 and helium-3 as well as mixtures of both isotopes. We describe our experimental setup and discuss our experiments on Bose-Einstein condensation of 4He* (more than 10 million atoms in a BEC) and sympathetic cooling of 3He* towards Fermi degeneracy (more than 1 million atoms below the Fermi temperature as well as realization of a degenerate boson-fermion mixture). We also present our results on Penning Ionization in ~1 mK clouds containing a single isotope (homonuclear losses) or a mixture of both isotopes (heteronuclear losses).We give an overview of the experiments at the Laser Centre of the Vrije Universiteit in Amsterdam on ultracold gases of metastable helium-4 and helium-3 as well as mixtures of both isotopes. We describe our experimental setup and discuss our experiments on Bose-Einstein condensation of 4He* (more than 10 million atoms in a BEC) and sympathetic cooling of 3He* towards Fermi degeneracy (more than 1 million atoms below the Fermi temperature as well as realization of a degenerate boson-fermion mixture). We also present our results on Penning Ionization in ~1 mK clouds containing a single isotope (homonuclear losses) or a mixture of both isotopes (heteronuclear losses).

arXiv:cond-mat/0610414Oct 16, 20060 citations

Quantum degenerate gases of metastable helium atoms

Denis Boiron, A. Perrin, Valentina Krachmalnicoff +14 more

Apr 1, 20080 citations

DEGENERATE FERMI GASES

Michael G. Bowler

Elsevier eBooksJan 1, 19820 citations

Production of a highly degenerate Fermi gas of metastable He3 atoms

Kieran F. Thomas, Zhuoxian Ou, B. M. Henson +3 more

We report on the achievement of quantum degeneracy in both components of a Bose-Fermi mixture of metastable helium atoms, $^{4}\mathrm{He}^{*}$ and $^{3}\mathrm{He}^{*}$ . Degeneracy is achieved via Doppler cooling and forced evaporation for $^{4}\mathrm{He}^{*}$ , and sympathetically cooling $^{3}\mathrm{He}^{*}$ with $^{4}\mathrm{He}^{*}$ . We discuss our modified implementation, along with the high versatility of our system. This technique is able to produce a degenerate Fermi gas with a minimum reduced temperature of $T/{T}_{F}=0.14(1)$ , consisting of $2.5\ifmmode\times\else\texttimes\fi{}{10}^{4}$ $^{3}\mathrm{He}^{*}$ atoms. Due to the high internal energy of both isotopes single atom detection is possible, opening the possibility of a large number of experiments into Bose-Fermi mixtures.We report on the achievement of quantum degeneracy in both components of a Bose-Fermi mixture of metastable helium atoms, $^{4}\mathrm{He}^{*}$ and $^{3}\mathrm{He}^{*}$. Degeneracy is achieved via Doppler cooling and forced evaporation for $^{4}\mathrm{He}^{*}$, and sympathetically cooling $^{3}\mathrm{He}^{*}$ with $^{4}\mathrm{He}^{*}$. We discuss our modified implementation, along with the high versatility of our system. This technique is able to produce a degenerate Fermi gas with a minimum reduced temperature of $T/{T}_{F}=0.14(1)$, consisting of $2.5\ifmmode\times\else\texttimes\fi{}{10}^{4}$ $^{3}\mathrm{He}^{*}$ atoms. Due to the high internal energy of both isotopes single atom detection is possible, opening the possibility of a large number of experiments into Bose-Fermi mixtures.

arXiv:2211.07111Physical Review AMar 15, 20236 citations

We report on the achievement of quantum degeneracy in both components of a Bose-Fermi mixture of metastable helium atoms,

^{4}\mathrm{He}^{*}

and

^{3}\mathrm{He}^{*}

. Degeneracy is achieved via Doppler cooling and forced evaporation for

^{4}\mathrm{He}^{*}

, and sympathetically cooling

^{3}\mathrm{He}^{*}

with

^{4}\mathrm{He}^{*}

. We discuss our modified implementation, along with the high versatility of our system. This technique is able to produce a degenerate Fermi gas with a minimum reduced temperature of

T/{T}_{F}=0.14(1)

, consisting of $2.5\ifmmode\times\else\texttimes\fi{}{10}^{4}$

^{3}\mathrm{He}^{*}

atoms. Due to the high internal energy of both isotopes single atom detection is possible, opening the possibility of a large number of experiments into Bose-Fermi mixtures.