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HL: Fachverband Halbleiterphysik

HL 17: Quantum Dots and Wires: Rings, Wires and Transport

HL 17.10: Vortrag

Dienstag, 10. März 2026, 12:00–12:15, POT/0251

Majorana bound states in 1D superconducting nanowires: detection, transport, and braiding — •Suhas Gangadharaiah — Indian Institute of Science Education and Research Bhopal India

Majorana bound states (MBSs) have emerged as promising candidates for robust quantum computation due to their topological protection. However, similar tunneling conductance features for both the MBSs and certain types of Andreev bound states have turned out to be a major obstacle in the verification of the presence of MBSs in semiconductor-superconductor heterostructures. In this talk, we will first discuss our protocol to probe properties specific to the MBSs and use it to distinguish the topological zero-bias peak (ZBP) from a trivial one [1]. We will next consider the dynamical transport of MBSs in the semiconductor-superconductor heterostructure in a realistic scenario involving noisy conditions and their role in inducing diabatic errors. We will discuss the scaling laws that relate these errors to the drive time [2]. Finally, we will discuss our ongoing work on MBS braiding in a trijunction geometry composed of three connected Kitaev chains.
1. Dibyajyoti Sahu, Vipin Khade, and Suhas Gangadharaiah. Effect of topological length on bound state signatures in a topological nanowire. Phys. Rev. B, 108:205426, Nov 2023.
2. Dibyajyoti Sahu and Suhas Gangadharaiah. Transport of Majorana bound states in the presence of telegraph noise. Physical Review B, 111(23):235306, June 2025.

Keywords: Majorana; Zero bias peak; Braiding; Dynamics; Andreev Bound States