  The electromagnetic form factors and low-energy observables of deuteron are
studied with the help of the light-front approach, where the deuteron is
regarded as a weekly bound state of a proton and a neutron. Both the $S-$ and
$D-$wave interacting vertexes among deuteron, proton, and neutron are taken
into account. Moreover, the regularization functions are also introduced. In
our calculations, the vertex and the regularization functions are employed to
simulate the momentum distribution inside the deuteron. Our numerical results
show that the light-front approach can roughly reproduce the deuteron
electromagnetic form factors, like charge $G_0$, magnetic $G_1$, and quadrupole
$G_2$, in the low $Q^2$ region. The important role of the $D-$wave vertex on
$G_2$ is also addressed.
