Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Full quantum dynamics of the electronic coupling between photosynthetic
  pigments   From studying the time evolution of the single electron density matrix within
a density functional tight-binding formalism we study in a fully atomistic
picture the electronic excitation transfer between two photosynthetic pigments
in real time. This time-dependent quantum dynamics is based on fully atomistic
structural models of the photosynthetic pigment. We analyze the dependence of
the electronic excitation transfer with distance and orientation between
photosynthetic pigments. We compare the results obtained from full quantum
dynamics with analytical ones, based on a two level system model were the
interaction between the pigments is dipolar. We observed that even when the
distance of the photosynthetic pigment is about $30$ \AA\ the deviation of the
dipolarity is of about $15$ percent.

29
The categories of this paper are: funct-an
34
The categories of this paper are: chem-ph
2
The categories of this paper are: math
1
The categories of this paper are: cs
20
The categories of this paper are: acc-phys
30
The categories of this paper are: q-alg
14
The categories of this paper are: math-ph
28
The categories of this paper are: alg-geom
36
The categories of this paper are: cmp-lg
18
The categories of this paper are: econ
32
The categories of this paper are: atom-ph
9
The categories of this paper are: nlin
5
The categories of this paper are: gr-qc
22
The categories of this paper are: chao-dyn
10
The categories of this paper are: q-bio
7
The categories of this paper are: hep-th