  Bogoliubov quasiparticles are a coherent electron-hole quantum superposition
which typically, for time-reversal symmetric superconductors, exhibit a
spectral distribution with particle-hole symmetry. Here, we demonstrate that in
two-dimensional noncentrosymmetric superconductors with multiorbital
spin-triplet pairing the energy profile of the density of states at the edge
can violate this paradigm. We show that the structure of Andreev reflections
generally leads to pairing states made of configurations that are orbitally
split due to the low degree of crystalline symmetry at the edge. The resulting
pairing state has a mixed parity character in the orbital sector that, in the
presence of reduced crystal symmetry at the edge, sets out a particle-hole
asymmetric profile for the spectral function. These findings indicate a path to
design asymmetric spectral functions at the edge of superconductors with
orbital degrees of freedom and time-reversal symmetry. The emerging signatures
can be exploited for the detection of spin-triplet pairing equipped with
internal degrees of freedom.
