Berlin 2012 – wissenschaftliches Programm

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HL: Fachverband Halbleiterphysik

HL 35: Transport: Quantum Coherence and Quantum Information Systems 3 (jointly with TT, MA)

HL 35.4: Vortrag

Dienstag, 27. März 2012, 10:30–10:45, BH 243

Quantum information transfer between topological and spin qubit systems — •Martin Leijnse and Karsten Flensberg — Nano-Science Center and Niels Bohr Institute, University of Copenhagen, Denmark

In this talk I will introduce a method to coherently transfer quantum information, and to create entanglement, between topological qubits and conventional spin qubits. The transfer method uses gated control to transfer an electron (spin qubit) between a quantum dot and edge Majorana modes in adjacent topological superconductors. Because of the spin polarization of the Majorana modes, the electron transfer translates spin superposition states into superposition states of the Majorana system, and vice versa. Furthermore, I will discuss how a topological superconductor can be used to facilitate long-distance quantum information transfer and entanglement between spatially separated spin qubits [1,2].
M. Leijnse, K. Flensberg, PRB 84, 140501(R) (2011)
M. Leijnse, K. Flensberg, PRL 107, 210502 (2011)