Noether Symmetry Approach in multiple scalar fields Scenario
  In this Letter, we find suitable potentials in the multiple scalar fields
scenario by using the Noether symmetry approach. We discussed three models with
multiple scalar fields: N-quintessence with positive kinetic terms, N-phantom
with negative kinetic terms and N-quintom with both positive and negative
kinetic terms. In the N-quintessence case, the exponential potential which
could be derived from several theoretic models is obtained from the Noether
conditions. In the N-phantom case, the potential
$\frac{V_{0}}{2}(1-\cos(\sqrt{\frac{3N}{2}}\frac{\phi}{m_{pl}}))$, which could
be derived from the Pseudo Nambu-Goldstone boson model, is chosen as the
Noether conditions required. In the N-quintom case, we derive a relation
$DV'_{\phi q}=-\tilde{D}V'_{\phi p}$ between the potential forms for the
quintessence-like fields and the phantom-like fields by using the Noether
symmetry.
