A
branch of physics based on quantum
theory. The laws of classical physics do not hold at the scales of interest
to nanotechnology. Thus, all the phenomena
occurring on a scale of atoms
must be described using formalism of quantum
physics. The objects on a scale of nanometer
do not behave as classical bodies which follow trajectories under influence
of forces. Rather, they behave both as waves and rigid bodies, depending on a
particular situation and a measurement one performs on them. This comes from
the fact that in quantum
theory energy
can be emitted or absorbed by matter only in discrete units called quanta
(singular quantum).
Source
