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Berlin 2024 – wissenschaftliches Programm

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HL: Fachverband Halbleiterphysik

HL 10: Focus Session: Evolution of Topological Materials into Superconducting Nanodevices I (joint session HL/TT)

HL 10.2: Vortrag

Montag, 18. März 2024, 15:15–15:30, EW 202

Quasparticle poisoning effects on electron transport through a Majorana wire — •Florinda Viñas Boström1,2 and Patrik Recher1,31Institut für Mathematische Physik, Technische Universität Braunschweig, D-38106 Braunschweig, Germany — 2Division of Solid State Physics and NanoLund, Lund University, Box 118, S-221 00 Lund, Sweden — 3Laboratory of Emerging Nanometrology, D-38106 Braunschweig, Germany

Majorana bound states have been suggested as building blocks for fault-tolerant quantum computational devices. However, a problem for both Majorana based and other types of superconducting qubits, is quasi-particle poisoning, where an additional quasiparticle changes the parity of the superconducting condensate. In this work, we show how quasi-particle poisoning affects electron transport through a Majorana wire coupled to current leads on each side of the wire, using an open systems approach combining master equations with full counting statistics. To describe the correct low-energy physics for current and noise, we include sequential- and co-tunneling processes in our description. We believe that our study will be a guide both for future theoretical work, and to analyze transport experiments of such setups.

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