Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Adapting approximate memory potentials for time-dependent density
  functional theory   Frequency dependent exchange correlation kernels for time-dependent density
functional theory can be used to construct approximate exchange-correlation
potentials. The resulting potentials are usually not translationally covariant
nor do they obey the so-called zero-force condition. These two basic symme-try
requirements are essential for using the potentials in actual applications
(even within the linear re-sponse regime). We provide two pragmatic methods for
imposing these conditions. As an example we take the Gross and Kohn (GK)
frequency dependent XC functional (Phys. Rev.Lett. 55, 2850 (1985)), correct
it, and numerically test it on a sodium metal cluster. Violation of the basic
symme-tries causes instabilities or spurious low frequency modes.

3
The categories of this paper are: physics
33
The categories of this paper are: plasm-ph
7
The categories of this paper are: hep-th
36
The categories of this paper are: cmp-lg
20
The categories of this paper are: acc-phys
24
The categories of this paper are: dg-ga
30
The categories of this paper are: q-alg
26
The categories of this paper are: bayes-an
1
The categories of this paper are: cs
29
The categories of this paper are: funct-an
19
The categories of this paper are: eess
23
The categories of this paper are: solv-int
28
The categories of this paper are: alg-geom
14
The categories of this paper are: math-ph
25
The categories of this paper are: patt-sol
12
The categories of this paper are: nucl-th