  We study the effects of various symmetry-breaking perturbations on the
experimentally measurable signatures (such as conductance and Josephson
response) of quasi-one-dimensional (quasi-1D) spin-triplet superconductors. In
the first part of the paper, we numerically compute the zero and nonzero
temperature conductances of the quasi-1D nanowires that host multiple Majorana
zero modes. Following the discussion of the case of s-wave Rashba nanowires, we
shift to the main focus, i.e., multichannel spin-triplet superconductors.
Applying gate voltages (which changes the symmetry of the spin-orbit coupling)
as well as magnetic fields to the nanowire, tunes the system between different
symmetry classes by splitting the multiple Majorana zero modes. We study how
the conductance tracks the topological invariants and the spectra in all these
cases. In the second part of the paper, we study the effects of the
symmetry-induced spectrum-breaking on the Andreev spectra of Josephson
junctions. Similar to the case of the conductance studies, we find that the
spectrum shows multiple zero-energy Andreev bound states in the highly
symmetric case with mirror and chiral symmetries.

Mesoscale and Nanoscale Physics