57,299 research outputs found
Collective Oscillations of Strongly Correlated One-Dimensional Bosons on a Lattice
We study the dipole oscillations of strongly correlated 1D bosons, in the
hard-core limit, on a lattice, by an exact numerical approach. We show that far
from the regime where a Mott insulator appears in the system, damping is always
present and increases for larger initial displacements of the trap, causing
dramatic changes in the momentum distribution, . When a Mott insulator
sets in the middle of the trap, the center of mass barely moves after an
initial displacement, and remains very similar to the one in the ground
state. We also study changes introduced by the damping in the natural orbital
occupations, and the revival of the center of mass oscillations after long
times.Comment: 4 pages, 5 figures, published versio
RTP control protocol (RTCP) extended report (XR) block for independent reporting of burst/fgp discard metrics
This document defines an RTP Control Protocol (RTCP) Extended Report
(XR) block that allows the reporting of burst/gap discard metrics
independently of the burst/gap loss metrics for use in a range of RTP
applications
Relationship between Horizontal Flow Velocity and Cell Lifetime for Supergranulation
A study of 50 supergranular cells obtained from SOHO Dopplergrams was
undertaken in order to investigate the relationship between the lifetime ()
and the horizontal flow velocity () of the cells. For this sample we find
that the two parameters are correlated with a relation and
is identified with the eddy turn-over time. This is in agreement with the
turbulent convective model of the solar atmosphere where the velocity spectrum
of supergranular field given by '' can be identified with
the Kolmogorov spectrum for the eddy size .Comment: 12th International Congress on Plasma Physics, 25-29 October 2004,
Nice (France
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