Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Photon-momentum transfer in diatomic molecules: an ab initio study   For a molecule, the two-center interference and the molecular scattering
phase of the electron are important for almost all the processes that may occur
in a laser field. In this study, we investigate their effects in the transfer
of linear photon momentum to the ionized electron by absorbing a single photon.
The time-dependent Schr\"odinger equation of H$_2^+$ is numerically solved in
{the multipolar} gauge in which the electric quadrupole term and the magnetic
dipole term are explicitly expressed. This allows us to separate the
contributions of the two terms in the momentum transfer. For different
configurations of the molecular and the laser orientation, the transferred
momentum to the electron is evaluated at different internuclear distances with
various photon energies { and two-center interferences are identified in the
whole region. At small electron energies and small internuclear distances, we
find significant deviations from the prediction of the classical double-slit
model due to the strong mediation of the Coulomb potential.} Finally, even for
a large internuclear distance, our results show that a varying molecular
scattering phase is important at all electron energies, which is beyond the
simple prediction of the linear combination of the atomical orbitals.

26
The categories of this paper are: bayes-an
13
The categories of this paper are: quant-ph
36
The categories of this paper are: cmp-lg
5
The categories of this paper are: gr-qc
17
The categories of this paper are: q-fin
18
The categories of this paper are: econ
4
The categories of this paper are: cond-mat
34
The categories of this paper are: chem-ph
32
The categories of this paper are: atom-ph
29
The categories of this paper are: funct-an
6
The categories of this paper are: astro-ph
15
The categories of this paper are: nucl-ex
0
The categories of this paper are: hep-ph
20
The categories of this paper are: acc-phys
25
The categories of this paper are: patt-sol
30
The categories of this paper are: q-alg