A Degenerate Bose-Fermi Mixture of Metastable Atoms

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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.
4 pages, 3 figures submitted to PRL

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Statistical Mechanics

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http://salesiana.dossiersoluciones.com/handle/123456789/112227

Consulte el texto completo en el siguiente enlace:

https://arxiv.org/abs/cond-mat/0606638
 http://arxiv.org/abs/cond-mat/0606638
 Phys. Rev. Lett. 97, 080404 (2006).
 doi:10.1103/PhysRevLett.97.080404

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arXiv