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arXiv · 0804.1543

Explanation of 100-fold reduction of spectral shifts for hydrogen on helium films

Kaden R. A. Hazzard·Erich J. Mueller
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Abstract

We show that helium film-mediated hydrogen-hydrogen interactions account for a two orders of magnitude discrepancy between previous theory and recent experiments on cold collision shifts in spin-polarized hydrogen adsorbed on a helium film. These attractive interactions also explain the anomalous dependence of the cold collision frequency shifts on the $^3$He covering of the film. Our findings suggest that the gas will become mechanically unstable before reaching the Kosterlitz-Thouless transition unless the experiment is performed in a drastically different regime, for example with a much different helium film geometry.

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Kaden R. A. Hazzard, Erich J. Mueller. 2008-04-09. Explanation of 100-fold reduction of spectral shifts for hydrogen on helium films. https://doi.org/10.1103/physrevlett.101.165301

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