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We analyze Andreev bound states (ABSs) that form in normal sections of aRashba nanowire that is only partially covered by a superconducting layer.These ABSs are localized close to the ends of the superconducting section andcan be pinned to zero energy over a wide range of magnetic field strengths evenif the nanowire is in the non-topological regime. For finite-size nanowires(typically $\lesssim 1$ $\mu$m in current experiments), the ABS localizationlength is comparable to the length of the nanowire. The probability density ofan ABS is therefore non-zero throughout the nanowire anddifferential-conductance calculations reveal a correlated zero-bias peak (ZBP)at both ends of the nanowire. When a second normal section hosts an additionalABS at the opposite end of the superconducting section, the combination of thetwo ABSs can mimic the closing and reopening of the bulk gap in local andnon-local conductances accompanied by the appearance of the ZBP. Thesesignatures are reminiscent of those expected for Majorana bound states (MBSs)but occur here in the non-topological regime. Our results demonstrate thatconductance measurements of correlated ZBPs at the ends of a typicalsuperconducting nanowire or an apparent closing and reopening of the bulk gapin the local and non-local conductance are not conclusive indicators for thepresence of MBSs.

Local and non-local quantum transport due to Andreev bound states in finite Rashba nanowires with superconducting and normal sections