Physics – Condensed Matter – Statistical Mechanics
Scientific paper
2006-06-25
Phys. Rev. Lett. 97, 080404 (2006).
Physics
Condensed Matter
Statistical Mechanics
4 pages, 3 figures submitted to PRL
Scientific paper
10.1103/PhysRevLett.97.080404
We report the observation of simultaneous quantum degeneracy in a dilute gaseous Bose-Fermi mixture of metastable atoms. Sympathetic cooling of helium-3 (fermion) by helium-4 (boson), both in the lowest triplet state, allows us to produce ensembles containing more than 10^6 atoms of each isotope at temperatures below 1 micro-Kelvin, and achieve a fermionic degeneracy parameter of T/Tf=0.45. Due to their high internal energy, the detection of individual metastable atoms with sub-nanosecond time resolution is possible, permitting the study of bosonic and fermionic quantum gases with unprecedented precision. This may lead to metastable helium becoming the mainstay of quantum atom optics.
Hogervorst Wim
Jeltes Tom
McNamara John M.
Tychkov A. S.
Vassen Wim
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