Topological Kondo Device for distinguishing Quasi-Majorana and Majorana signatures

The hybridized superconductor-semiconductor nanowire device has been predicted to host Majorana zero modes (MZMs) in it. To confirm the Majorana signatures, significant efforts have been devoted to distinguishing between MZMs and spatially separated quasi-Majorana modes (QMMs). Because both MZMs and QMMs cause a quantized zero-bias peak in the conductance measurement, their verification task is thought to be very difficult. In this work, we proposed a simple device with a single nanowire, where the device could develop clear evidence of the topological Kondo effect in the topologically trivial phase with four QMMs. On the other hand, in the topological superconducting phase with MZMs, the transport signatures are significantly different. Therefore, our scheme provides a simple way to distinguish Majorana and quasi-Majorana modes. Besides, we believe that our device is much easier to realize the topological Kondo effect than the standard TKE devices that require at least two nanowires.