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

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

2000-09-25

arxiv.org/abs/cond-mat/0009371v3

Physics

Condensed Matter

Revised version with corrections, which do not significantly affect conclusions. Should be read in conjunction with the new pa

Scientific paper

10.1088/0953-4075/34/23/311

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 = 2\pi\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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