Intermediate states in Andreev bound state fusion

Abstract Hybridization is one of the most fundamental quantum mechanical phenomena, with text book example binding two hydrogen atoms in a molecule. Here we report tunnel spectroscopy experiments illustrating hybridization another type discrete states, namely superconducting subgap states that form segments semiconducting nanowire contact reservoirs. We discuss collection intermediate unique (tunnel) spectroscopic fingerprints process merging well-known individual bound hybridized by central dot and eventually coherently linking reservoirs, carrying Josephson current. These coupled fused Andreev can be seen as analogues to atomic molecular single electron nature, explain variety recent state spectra, specific will have winnowed future Majorana fusion experiments.