Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Electron Dynamics in a DNA Molecule   We report on our theoretical investigations of the electronic states in a DNA
molecule. We have used a two-leg charge ladder model where electron-electron
interactions and the electron spin have been taken into account. The energy
spectra for G-C and A-T base pairs obtained by numerically diagonalizing the
Hamiltonian reveal a gap structure and the interaction is found to enhance the
energy gaps. We also present the charge distribution in the ground state and
low-lying excited states for the A-T and G-C base pairs.

23
The categories of this paper are: solv-int
33
The categories of this paper are: plasm-ph
30
The categories of this paper are: q-alg
17
The categories of this paper are: q-fin
19
The categories of this paper are: eess
22
The categories of this paper are: chao-dyn
35
The categories of this paper are: mtrl-th
24
The categories of this paper are: dg-ga
8
The categories of this paper are: hep-ex
34
The categories of this paper are: chem-ph
18
The categories of this paper are: econ
27
The categories of this paper are: comp-gas
13
The categories of this paper are: quant-ph
1
The categories of this paper are: cs
12
The categories of this paper are: nucl-th
29
The categories of this paper are: funct-an