An information register stores information represented by the states of
endohedral fullerenes in a nanotube. Possible states are spin-states or
morphological states, such as endohedral species having intrinsic or
induced electric dipole moment or characteristic electric polarizility.
The states of successive endohedral fullerenes along the nanotube are
coupled by interaction mediated by electrons in the nanotube. The
register can be used as part of a quantum computer or a classical
computer.