Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Chirp control of directional current in monolayer graphene by intense
  few-cycle laser   The residual current density in monolayer graphene driven by an intense
few-cycle chirped laser pulse is investigated via numerical solution of the
time-dependent Schr\"odinger equation. It is found that the residual current is
sensitive to the initial chirp rate, and the defined asymmetry degree for
current along the different polarization direction versus chirp rate follows a
simple sinusoidal function. The underlying physical mechanism is the
chirp-dependent Landau-Zener-St\"uckelberg interference. The chirp control of
currents provides a novel convenient tool in the petaHertz switching of
two-dimensional materials based optoelectronic devices on the sub-femtosecond
timescale.

18
The categories of this paper are: econ
29
The categories of this paper are: funct-an
9
The categories of this paper are: nlin
17
The categories of this paper are: q-fin
19
The categories of this paper are: eess
0
The categories of this paper are: hep-ph
7
The categories of this paper are: hep-th
22
The categories of this paper are: chao-dyn
27
The categories of this paper are: comp-gas
8
The categories of this paper are: hep-ex
31
The categories of this paper are: ao-sci
6
The categories of this paper are: astro-ph
16
The categories of this paper are: stat
5
The categories of this paper are: gr-qc
26
The categories of this paper are: bayes-an
32
The categories of this paper are: atom-ph