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APS » Journals » Phys. Rev. Lett. » Volume 81 » Issue 18
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Phys. Rev. Lett. 81, 3811–3814 (1998)

Bose-Einstein Condensation of Atomic Hydrogen

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Dale G. Fried, Thomas C. Killian, Lorenz Willmann, David Landhuis, Stephen C. Moss, Daniel Kleppner, and Thomas J. Greytak
Department of Physics and Center for Materials Science and Engineering, Massachusetts Institute of Technology, Cambridge, Massachusetts 02139

Received 11 September 1998; published in the issue dated 2 November 1998

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We report observation of Bose-Einstein condensation (BEC) of a trapped, dilute gas of atomic hydrogen. The condensate and normal gas are studied by two-photon spectroscopy of the 1S- 2S transition. Interactions among the atoms produce a shift of the resonance frequency proportional to density. The condensate is clearly distinguished by its large frequency shift. The peak condensate density is 4.8±1.1×1015cm-3, corresponding to a condensate population of 109 atoms. The BEC transition occurs at about T = 50μK and n = 1.8×1014cm-3.

© 1998 The American Physical Society

URL:
http://link.aps.org/doi/10.1103/PhysRevLett.81.3811
DOI:
10.1103/PhysRevLett.81.3811
PACS:
03.75.Fi, 05.30.Jp, 32.80.Pj, 67.65.+z
 
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