Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Theory of multiexciton generation in semiconductor nanocrystals   We develop a generalized framework based on a Green's function formalism to
calculate the efficiency of multiexciton gen-eration in nanocrystal quantum
dots. The direct/indirect absorption and coherent/incoherent impact ionization
mechanisms, often used to describe multiexciton generation in nanocrystals, are
reviewed and rederived from the unified theory as certain approximations. In
addition, two new limits are described systematically - the weak Coulomb
coupling limit and the semi-wide band limit. We show that the description of
multiexciton generation in nanocrystals can be described as incoherent process
and we discuss the scaling of multiexciton generation with respect to the
photon energy and nanocrystal size. Illustrations are given for three prototype
systems: CdSe, InAs and silicon quantum dots.

21
The categories of this paper are: adap-org
8
The categories of this paper are: hep-ex
17
The categories of this paper are: q-fin
37
The categories of this paper are: supr-con
34
The categories of this paper are: chem-ph
30
The categories of this paper are: q-alg
6
The categories of this paper are: astro-ph
35
The categories of this paper are: mtrl-th
14
The categories of this paper are: math-ph
3
The categories of this paper are: physics
25
The categories of this paper are: patt-sol
10
The categories of this paper are: q-bio
24
The categories of this paper are: dg-ga
15
The categories of this paper are: nucl-ex
13
The categories of this paper are: quant-ph
36
The categories of this paper are: cmp-lg