Regensburg 2016 – wissenschaftliches Programm

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HL: Fachverband Halbleiterphysik

HL 43: Symposium SYTI: Topological Insulators: Status Quo and Future Directions (Joint session of DS, HL, MA, O and TT, organized by TT)

HL 43.5: Hauptvortrag

Mittwoch, 9. März 2016, 11:45–12:15, H1

Majorana takes charge: from teleportation to quantum computation — •Liang Fu — MIT, Cambridge, USA

Majorana modes are zero-energy modes bound to vortices and defects in topological superconductors. A pair of spatially separated Majorana modes gives rise to a fermion mode, which has an intrinscially nonlocal character and can be occupied or empty thus defining a topological qubit. In this talk, I will describe how the nonlocality of Majoana modes is manifested in conductance measurement on a topological superconductor island, how non-ovelapping Majorana modes can be controllably coupled, and how an array of such coupled Majorana modes can be used for quantum information processing. Key to all these pheonema is the interplay between Majorana modes and charging energy, and hence the title "Majorana takes charge".