Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Non-equilibrium magnetic interactions in strongly correlated systems   We formulate a low-energy theory for the magnetic interactions between
electrons in the multi-band Hubbard model under non-equilibrium conditions
determined by an external time-dependent electric field which simulates
laser-induced spin dynamics. We derive expressions for dynamical exchange
parameters in terms of non-equilibrium electronic Green functions and
self-energies, which can be computed, e.g., with the methods of time-dependent
dynamical mean-field theory. Moreover, we find that a correct description of
the system requires, in addition to exchange, a new kind of magnetic
interaction, that we name "twist exchange", which formally resembles
Dzyaloshinskii-Moriya coupling, but is not due to spin-orbit, and is actually
due to an effective three-spin interaction. Our theory allows the evaluation of
the related time-dependent parameters as well.

31
The categories of this paper are: ao-sci
5
The categories of this paper are: gr-qc
0
The categories of this paper are: hep-ph
30
The categories of this paper are: q-alg
13
The categories of this paper are: quant-ph
1
The categories of this paper are: cs
26
The categories of this paper are: bayes-an
12
The categories of this paper are: nucl-th
34
The categories of this paper are: chem-ph
11
The categories of this paper are: hep-lat
29
The categories of this paper are: funct-an
3
The categories of this paper are: physics
25
The categories of this paper are: patt-sol
35
The categories of this paper are: mtrl-th
8
The categories of this paper are: hep-ex
28
The categories of this paper are: alg-geom