Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Laser induced ultrafast demagnetization: an \emph{ab-initio} perspective   Time-dependent density functional theory is implemented in an all electron
solid-state code for the case of fully non-collinear spins. We use this to
study laser induced demagnetization in Fe, Co and Ni. It is shown that this
demagnetization is a two-step process: excitation of a fraction of electrons
followed by spin-flip transitions of the remaining localized electrons. These
results successfully explain several experimental features such as the time-lag
between the start of the pulse and demagnetization and spin-flip excitations
dominating the physics. We further show that it is possible to control the
moment loss by tunable laser parameters like frequency, duration and intensity.

31
The categories of this paper are: ao-sci
18
The categories of this paper are: econ
5
The categories of this paper are: gr-qc
7
The categories of this paper are: hep-th
23
The categories of this paper are: solv-int
9
The categories of this paper are: nlin
36
The categories of this paper are: cmp-lg
0
The categories of this paper are: hep-ph
30
The categories of this paper are: q-alg
34
The categories of this paper are: chem-ph
3
The categories of this paper are: physics
1
The categories of this paper are: cs
11
The categories of this paper are: hep-lat
8
The categories of this paper are: hep-ex
15
The categories of this paper are: nucl-ex
17
The categories of this paper are: q-fin