Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Correlating Quasi-Electron Relaxation with Quantum Femtosecond Magnetism
  in the Order Parameter Dynamics of Insulating Manganites   Femtosecond (fs)-resolved simultaneous measurements of charge and spin
dynamics reveal the coexistence of two different quasi-particle excitations in
colossal magneto-resistive (CMR) manganites, with {\em fs} and {\em ps}
relaxation times respectively. Their populations reverse size above a {\em
photoexcitation-intensity-threshold} coinciding with a "sudden"
antiferro-to-ferromagnetic switching during $<$100 fs laser pulses. We present
evidence that fast, metallic, mobile quasi--electrons dressed by {\em quantum
spin fluctuations} coexist with slow, localized, polaronic charge carriers in
non-equilibrium phases. This may be central to CMR transition and leads to a
laser-driven charge reorganization simultaneously with quantum fs magnetism via
an emergent quantum-spin/charge/lattice transient coupling.

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The categories of this paper are: chao-dyn
2
The categories of this paper are: math
21
The categories of this paper are: adap-org
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The categories of this paper are: dg-ga
31
The categories of this paper are: ao-sci
15
The categories of this paper are: nucl-ex
33
The categories of this paper are: plasm-ph
14
The categories of this paper are: math-ph
6
The categories of this paper are: astro-ph
10
The categories of this paper are: q-bio
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The categories of this paper are: q-fin
8
The categories of this paper are: hep-ex
29
The categories of this paper are: funct-an
13
The categories of this paper are: quant-ph
37
The categories of this paper are: supr-con
27
The categories of this paper are: comp-gas