Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Quantum path interferences in high-order harmonic generation from
  aligned diatomic molecules   Electron quantum path interferences in strongly laser-driven aligned
molecules and their dependence on the molecular alignment is an essential open
problem in strong-field molecular physics. Here, we demonstrate an approach
which provides direct access to the observation of these interference
processes. The approach is based on the combination of the
time-gated-ion-microscopy technique with a pump-probe arrangement used to align
the molecules and generate high-order harmonics. By spatially resolving the
interference pattern produced by the spatiotemporal overlap of the harmonics
emitted by the short and long electron quantum paths, we have succeeded in
measuring in situ their phase difference and disclose their dependence on
molecular alignment. The findings constitute a vital step towards an
understanding of strong-field molecular physics and the development of
attosecond spectroscopy approaches without the use of auxiliary atomic
references.

29
The categories of this paper are: funct-an
7
The categories of this paper are: hep-th
12
The categories of this paper are: nucl-th
11
The categories of this paper are: hep-lat
10
The categories of this paper are: q-bio
6
The categories of this paper are: astro-ph
19
The categories of this paper are: eess
22
The categories of this paper are: chao-dyn
33
The categories of this paper are: plasm-ph
15
The categories of this paper are: nucl-ex
27
The categories of this paper are: comp-gas
9
The categories of this paper are: nlin
37
The categories of this paper are: supr-con
32
The categories of this paper are: atom-ph
8
The categories of this paper are: hep-ex
36
The categories of this paper are: cmp-lg