Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Spin dependent analysis of homogeneous and inhomogeneous exciton
  decoherence in magnetic fields   This paper discusses the combined effects of optical excitation power,
interface roughness, lattice temperature, and applied magnetic fields on the
spin-coherence of excitonic states in GaAs/AlGaAs multiple quantum wells. For
low optical powers, at lattice temperatures between 4 K and 50 K, the
scattering with acoustic phonons and short-range interactions appear as the
main decoherence mechanisms. Statistical fluctuations of the band-gap however
become also relevant in this regime and we were able to deconvolute them from
the decoherence contributions. The circularly polarized
magneto-photoluminescence unveils a non-monotonic tuning of the coherence for
one of the spin components at low magnetic fields. This effect has been
ascribed to the competition between short-range interactions and spin-flip
scattering, modulated by the momentum relaxation time.

25
The categories of this paper are: patt-sol
16
The categories of this paper are: stat
19
The categories of this paper are: eess
29
The categories of this paper are: funct-an
17
The categories of this paper are: q-fin
28
The categories of this paper are: alg-geom
0
The categories of this paper are: hep-ph
18
The categories of this paper are: econ
6
The categories of this paper are: astro-ph
23
The categories of this paper are: solv-int
8
The categories of this paper are: hep-ex
34
The categories of this paper are: chem-ph
14
The categories of this paper are: math-ph
24
The categories of this paper are: dg-ga
26
The categories of this paper are: bayes-an
12
The categories of this paper are: nucl-th