Phys. Rev. Lett. 81, 4545–4548 (1998)Observation of Quasicondensate in Two-Dimensional Atomic HydrogenReceived 6 February 1998; published in the issue dated 23 November 1998 We have performed magnetic compression experiments with the two-dimensional gas of hydrogen atoms on liquid 4He at T = 120–200mK. For 2D phase-space densities higher than 3, the probability of three-body dipole recombination is observed to decrease gradually by an order of magnitude in comparison to its low-density value Kbbb = 8.4(3.5)×10-25cm4s-1. This is attributed to local coherence developing in a 2D quasicondensate. We have also determined the value U/k = 5.1(5)×10-15Kcm2 for the mean-field energy of the gas. © 1998 The American Physical Society URL:
http://link.aps.org/doi/10.1103/PhysRevLett.81.4545
DOI:
10.1103/PhysRevLett.81.4545
PACS:
03.75.Fi, 05.30.Jp, 67.65.+z, 68.35.Rh
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