Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Calculation of van der Walls coefficients of alkali metal clusters by
  hydrodynamic approach to time-dependent density-functional theory   In this paper we employ the hydrodynamic formulation of time-dependent
density functional theory to obtain the van der Waal coefficients $C_{6}$ and
$C_{8}$ of alkali-metal clusters of various sizes including very large
clusters. Such calculation becomes computationally very demanding in the
orbital-based Kohn-Sham formalism, but quite simple in the hydrodynamic
approach. We show that for interactions between the clusters of same sizes,
$C_{6}$ and $C_{8}$ sale as the sixth and the eighth power of the cluster
radius rsepectively, and approach the respective classically predicted values
for the large size clusters.

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The categories of this paper are: atom-ph
24
The categories of this paper are: dg-ga
36
The categories of this paper are: cmp-lg
28
The categories of this paper are: alg-geom
8
The categories of this paper are: hep-ex
29
The categories of this paper are: funct-an
15
The categories of this paper are: nucl-ex
13
The categories of this paper are: quant-ph
6
The categories of this paper are: astro-ph
0
The categories of this paper are: hep-ph
4
The categories of this paper are: cond-mat
11
The categories of this paper are: hep-lat
19
The categories of this paper are: eess
2
The categories of this paper are: math
18
The categories of this paper are: econ
10
The categories of this paper are: q-bio