6,598 research outputs found
Minimalist's Linux Cluster
Using barebone PC components and NIC's, we construct a linux cluster which
has 2-dimensional mesh structure. This cluster has smaller footprint, is less
expensive, and use less power compared to conventional linux cluster. Here, we
report our experience in building such a machine and discuss our current
lattice project on the machine.Comment: 3 pages, 2 figures, Proceedings of the Lattice 03 Conference
(Tsukuba, Japan
Three-Body Losses in Trapped Bose-Einstein Condensed Gases
A time-dependent Kohn-Sham (KS)-like equation for N bosons in a trap is
generalized for the case of inelastic collisions. We derive adiabatic equations
which are used to calculate the nonlinear dynamics of the Bose-Einstein
condensate (BEC) and non-mean field corrections due to the three-body
recombination. We find that the calculated corrections are about 13 times
larger for 3D trapped dilute bose gases and about 7 times larger for 1D trapped
weakly interacting bose gases when compared with the corresponding corrections
for the ground state energy and for the collective frequencies.Comment: 11 pages, 2 figure
Cold Bose Gases near Feshbach Resonances
The lowest order constrained variational method [Phys. Rev. Lett. 88, 210403
(2002)] has been generalized for a dilute (in the sense that the range of
interatomic potential is small compared with inter-particle spacing) uniform
gas of bosons near the Feshbach resonance using the multi-channel zero-range
potential model. The method has been applied to Na (F=1, m_F=1) atoms near the
G Feshbach resonance. It is shown that at high densities, there are
significant differences between our results for the real part of energy per
particle and the one-channel zero-range potential approximation. We point out
the possibility of stabilization of the uniform con densate for the case of
negative scattering length.Comment: Revised version of cond-mat/0212196. Added Eqs. (21,22) and
references for section
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