Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Disentangling the role of laser coupling in directional breaking of
  molecules   The directional control of molecular dissociation with the laser electric
field waveform is a paradigm and was demonstrated for a variety of molecules.
In most cases, the directional control occurs via a dissociative ionization
pathway. The role of laser-induced coupling of electronic states in the
dissociating ion versus selective ionization of oriented neutral molecules,
however, could not be distinguished for even small heteronuclear molecules such
as CO. Here, we introduce a technique, using elliptically polarized pump and
linearly polarized two-color probe pulses that unambiguously distinguishes the
roles of laser-induced state coupling and selective ionization. The measured
photoelectron momentum distributions governed by the light polarizations allow
us to coincidently identify the ionization and dissociation from the pump and
probe pulses. Directional dissociation of CO+ as a function of the relative
phase of the linearly polarized two-color pulse is observed for both parallel
and orthogonally oriented molecules. We find that the laser-induced coupling of
various electronic states of CO+ plays an important role for the observed
directional bond breaking, which is verified by quantum calculations.

5
The categories of this paper are: gr-qc
9
The categories of this paper are: nlin
23
The categories of this paper are: solv-int
20
The categories of this paper are: acc-phys
7
The categories of this paper are: hep-th
1
The categories of this paper are: cs
13
The categories of this paper are: quant-ph
24
The categories of this paper are: dg-ga
29
The categories of this paper are: funct-an
22
The categories of this paper are: chao-dyn
15
The categories of this paper are: nucl-ex
6
The categories of this paper are: astro-ph
32
The categories of this paper are: atom-ph
12
The categories of this paper are: nucl-th
33
The categories of this paper are: plasm-ph
8
The categories of this paper are: hep-ex