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Analysis of g2 for the cold collision frequency shift in the hydrogen condensate experiments

C W Gardiner and A S Bradley

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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 (≈44 µK) and in the very shallow trap employed (ωz = 2π×10.2 Hz) the contribution to the density from the quasiparticles is about 20% of that from the condensate mode, leading to an effective g2(x,x) which varies between 1 and 3 depending on the position in the condensate.


PACS

05.30.Jp Boson systems

37.10.De Atom cooling methods

03.75.Hh Static properties of condensates; thermodynamical, statistical and structural properties

Subjects

Atomic and molecular physics

Quantum gases, liquids and solids

Statistical physics and nonlinear systems

Dates

Issue 23 (14 December 2001)

Received 30 August 2001

Published 21 November 2001



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