Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Time-Dependent B-Spline R-Matrix Approach to Double Ionization of Atoms
  by XUV Laser Pulses   We present an {\it ab initio} and non-perturbative time-dependent approach to
the problem of double ionization of a general atom driven by intense XUV laser
pulses. After using a highly flexible $B$-Spline $R$-matrix method to generate
field-free Hamiltonian and electric dipole matrices, the initial state is
propagated in time using an efficient Arnoldi-Lanczos scheme. Test calculations
for double ionization of He by a single laser pulse yield good agreement with
benchmark results obtained with other methods. The method is then applied to
two-color pump-probe processes, for which momentum and energy distributions of
the two outgoing electrons are presented.

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The categories of this paper are: acc-phys
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The categories of this paper are: dg-ga
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The categories of this paper are: nucl-th
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The categories of this paper are: q-bio
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The categories of this paper are: astro-ph
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The categories of this paper are: alg-geom
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The categories of this paper are: nucl-ex
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The categories of this paper are: gr-qc
31
The categories of this paper are: ao-sci
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The categories of this paper are: supr-con
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The categories of this paper are: atom-ph
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The categories of this paper are: chem-ph
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The categories of this paper are: funct-an
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The categories of this paper are: hep-ph
30
The categories of this paper are: q-alg
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The categories of this paper are: hep-lat