Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Probing Molecular Dynamics at Attosecond Resolution with Femtosecond
  Laser Pulses   The kinetic energy distribution of D$^+$ ions resulting from the interaction
of a femtosecond laser pulse with D$_2$ molecules is calculated based on the
rescattering model. From analyzing the molecular dynamics, it is shown that the
recollision time between the ionized electron and the D$_2^+$ ion can be read
from the D$^+$ kinetic energy peaks to attosecond accuracy. We further suggest
that more precise reading of the clock can be achieved by using shorter fs
laser pulses (about 15fs).

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The categories of this paper are: q-bio
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The categories of this paper are: stat
32
The categories of this paper are: atom-ph
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The categories of this paper are: cmp-lg
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The categories of this paper are: adap-org
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The categories of this paper are: nucl-th
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The categories of this paper are: funct-an
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The categories of this paper are: solv-int
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The categories of this paper are: supr-con
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The categories of this paper are: nucl-ex
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The categories of this paper are: comp-gas
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The categories of this paper are: cs
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The categories of this paper are: hep-ex
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The categories of this paper are: patt-sol
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The categories of this paper are: math-ph
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The categories of this paper are: dg-ga