Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Imaging the square of the correlated two-electron wave function of a
  hydrogen molecule   The toolbox for imaging molecules is well-equipped today. Some techniques
visualize the geometrical structure, others the electron density or electron
orbitals. Molecules are many-body systems for which the correlation between the
constituents is decisive and the spatial and the momentum distribution of one
electron depends on those of the other electrons and the nuclei. Such
correlations have escaped direct observation by imaging techniques so far.
Here, we implement an imaging scheme which visualizes correlations between
electrons by coincident detection of the reaction fragments after high energy
photofragmentation. With this technique, we examine the H2 two-electron wave
function in which electron-electron correlation beyond the mean-field level is
prominent. We visualize the dependence of the wave function on the internuclear
distance. High energy photoelectrons are shown to be a powerful tool for
molecular imaging. Our study paves the way for future time resolved correlation
imaging at FELs and laser based X-ray sources.

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The categories of this paper are: hep-th
5
The categories of this paper are: gr-qc
24
The categories of this paper are: dg-ga
16
The categories of this paper are: stat
36
The categories of this paper are: cmp-lg
6
The categories of this paper are: astro-ph
18
The categories of this paper are: econ
14
The categories of this paper are: math-ph
33
The categories of this paper are: plasm-ph
37
The categories of this paper are: supr-con
27
The categories of this paper are: comp-gas
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The categories of this paper are: q-fin
35
The categories of this paper are: mtrl-th
28
The categories of this paper are: alg-geom
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The categories of this paper are: nucl-th
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The categories of this paper are: adap-org