  We study both the static properties of $^{11}$Be and its reaction dynamics
during electromagnetic breakup under a unified framework. A many-body approach
- the antisymmetrized molecular dynamics (AMD) is used to describe the
structure of the neutron-halo nucleus, $^{11}$Be. The same AMD wave function is
then adapted as an input to the fully quantum theory of Coulomb breakup under
the aegis of the finite range distorted wave Born approximation theory. The
calculated observables are also compared with those obtained with a
phenomenological Woods-Saxon potential model wave function. The experimental
core-valence neutron relative energy spectrum and dipole response along with
other observables are well described by our calculations.
