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Abstracts
O3.1
Ultraquantum decay of strongly nonequilibrated BEC turbulence
G.W. Stagg, N.G. Parker, and C.F. Barenghi
School of Mathematics and Statistics and Joint Quantum Centre
Durham-Newcastle, Newcastle University, Newcastle upon Tyne, NE1
7RU, United Kingdom
Following Berloff and Svistunov (2002) we study the emergence of a
macroscopically coherent condensate from the cooling of a thermal gas
of weakly-interacting bosons. Starting from a uniformy occupied highly
nonequilibrated condition, we track the growth of the low k modes which feature
a tangle of quantised vortex lines. Analysis of vortex line density, incompressible
energy spectrum and correlation function suggests that the tangle is a random
flow without large scale structures similar to the ultraquantum turbulence of
Walmsley and Golov (2008) and the counterflow turbulence first observed by
Vinen.
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