  We examine nuclear scission within a fully quantum-mechanical microscopic
framework, focusing on the non-local aspects of the theory. Using
$^{240}\textrm{Pu}$ hot fission as an example, we discuss the identification of
the fragments and the calculation of their kinetic, excitation, and interaction
energies, through the localization of the orbital wave functions. We show that
the "disentanglement" of the fragment wave functions is essential to the
quantum-mechanical definition of scission and the calculation of physical
observables. Finally, we discuss the fragments' pre-scission excitation
mechanisms and give a non-adiabatic description of their evolution beyond
scission.
