  Quasi-two-dimensional systems may exibit curvature, which adds
three-dimensional influence to their internal properties. As shown by da Costa
\cite{dacosta}, charged particles moving on a curved surface experience a
curvature-dependent potential which greatly influence their dynamics. In this
paper, we study the electronic ballistic transport in deformed nanotubes. The
one-electron Schr\"odinger equation with open boundary conditions is solved
numerically with a flexible MAPLE code made available as Supplementary Data. We
find that the curvature of the deformations have indeed strong effects on the
electron dynamics suggesting its use in the design of nanotube-based electronic
devices.
