Fano-Majorana effect and bound states in the continuum on a crossbar-shaped quantum dot hybrid structure

We investigate transport properties through a crossbar-shaped structure formed by a quantum dot (QD) coupled to two normal leads and embedded between two one-dimensional topological superconductors (TSCs). Each TSC host Majorana bound states (MBSs) at its ends, which can interact between them with an effective coupling strength. We found a signature of bound states in the continuum (BIC) in the MBSs spectral function. By allowing finite inter MBSs coupling, BICs splitting is observed and shows projection in transmission for asymmetric coupling case. As a consequence, we also show that the Fano effect, arising from interference phenomena between MBSs hybridization trough QD, is observed with a half-integer amplitude modulation. We believe our findings can be helpful for understanding the properties of MBSs and its interplay with QDs.