Is a quantum dot a good tool to detect the topological properties of a proximitized Rasba nanowire?

Recent experiments in developing Majorana qubits have focused on semiconductor-superconductor Rashba nanowire junctions. A quantum dot is located in the non-superconducting section of the nanowire and is used to probe its topological properties. Various phenomena can be understood with the transport measurement through the quantum dot such as the renormalization of the g-factor [1] as well as the flipping of the bulk band resulting from the topological transition [2,3]. However, the presence of such quantum dot can also mimic the zero-bias peak feature [4], questioning the presence of the topological phase and, as a consequence, temporarily blocking the road towards topological quantum computation.

[1] O. Dmytruk et al, Phys. Rev. B 98, 165403 (2018).
[2] D. Chevallier et al, Phys. Rev. B 97, 045404 (2018).
[3] P. Szumniak et al, Phys. Rev. B 96, 041401(R) (2018).
[4] C. Reeg et al, ArXiv:1810.09840.