Berlin 2012 – scientific programme
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HL: Fachverband Halbleiterphysik
HL 35: Transport: Quantum Coherence and Quantum Information Systems 3 (jointly with TT, MA)
HL 35.2: Talk
Tuesday, March 27, 2012, 10:00–10:15, BH 243
Engineering and manipulating Majorana bound states in 1D quantum wires — •Panagiotis Kotetes1, Alexander Shnirman2, and Gerd Schön1 — 1Institut für Theoretische Festkörperphysik, Karlsruhe Institute of Technology, 76128 Karlsruhe, Germany — 2Institut für Theorie der Kondensierten Materie, Karlsruhe Institute of Technology, D-76128 Karlsruhe, Germany
Recently, the interest in topological quantum computing has grown due to the appearance of promising platforms for realizing the long sought Majorana bound states. Among the proposals that appear suitable for engineering the Majorana bound states, the most prominent involves a 1D semiconducting quantum wire in proximity to a bulk s-wave superconductor, where in addition a Zeeman magnetic field is applied. In this work, we investigate the possibility of performing qubit operations via the adiabatic variation of certain internal parameters without using any external gates or network of wires. The crucial feature of our model is the combination and interplay of phases for the magnetic field and the superconducting order parameter. In an appropriate junction setup, we explore the possible phase configurations that could lead to a Majorana bound state exchange.