  Within the effective-mass approximation, we theoretically investigated the
electronic and transport properties of 2D semiconductor quantum wires (QWs)
with anisotropic effective masses and different orientations with respect to
the anisotropic axis. The energy levels in the absence and presence of an
external magnetic field are analytically calculated, showing: (i) a strong
dependence on the spacing of energy levels related to the alignment QW angle
and the anisotropy axis; and (ii) for non-null magnetic field, the quantum Hall
edge states are significantly affected by the edge orientation. Moreover, by
means of the split-operator technique, we analyzed the time evolution of
wavepackets in straight and V-shaped anisotropic QWs and compared the
transmission probabilities with those of isotropic systems. In the anisotropic
case we found damped oscillations in the average values of velocity in both x
and y directions for a symmetric Gaussian wavepacket propagating along a
straight wide QW, with the oscillation being more evident as the
non-collinearity between the group velocity and momentum vectors increases.
