Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Coherent and incoherent aspects of polariton dynamics in semiconductor
  microcavities   The interaction between coherent polaritons and incoherent excitons plays an
important role in polariton physics. Using resonant pump-probe spectroscopy
with selective excitation of single polariton branches, we investigate the
different dephasing mechanisms responsible for generating a long-lived exciton
reservoir. As expected, pumping the upper polariton results in a strong
dephasing process that leads to the generation of a long lived reservoir.
Unexpectedly, we observe an efficient reservoir creation while exciting only
the lower polariton branch when the detuning is increased towards positive
detuning. We propose a simple theoretical model, the polaritonic Bloch
equations, to describe the dynamics of the system.

28
The categories of this paper are: alg-geom
32
The categories of this paper are: atom-ph
8
The categories of this paper are: hep-ex
22
The categories of this paper are: chao-dyn
31
The categories of this paper are: ao-sci
18
The categories of this paper are: econ
21
The categories of this paper are: adap-org
37
The categories of this paper are: supr-con
11
The categories of this paper are: hep-lat
19
The categories of this paper are: eess
36
The categories of this paper are: cmp-lg
14
The categories of this paper are: math-ph
29
The categories of this paper are: funct-an
23
The categories of this paper are: solv-int
20
The categories of this paper are: acc-phys
7
The categories of this paper are: hep-th