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Analysis of g_2 for the cold-collision frequency shift in the hydrogen condensate experiments

C. W. Gardiner·A. S. Bradley
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Abstract

We compute an approximate set of longitudinal quasiparticle modes for a hydrogen condensate as produced in the MIT experiments. An expansion in quasiparticles using a simple one-dimensional Bogoliubov picture shows however that at the high temperatures (\approx 44muK) and in the very shallow trap employed (omega_z = 2π\times 10.2Hz) the contribution to the density from the quasiparticles is about 20% of that from the condensate mode, leading to an effective $ g_2(x,x) which varies between 1 and 3 depending on the position in the condensate.

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C. W. Gardiner, A. S. Bradley. 2001-08-29. Analysis of g_2 for the cold-collision frequency shift in the hydrogen condensate experiments. https://doi.org/10.1088/0953-4075%2F34%2F23%2F311

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