2011/07/31 by Martin Leijnse, Karsten Flensberg
Physics and Astronomy · #cond-mat.supr-con #cond-mat.mes-hall #quant-ph
paper · pdf · doi:10.1103/physrevlett.107.210502
published as Phys. Rev. Lett. 107, 210502 (2011) · 4+ pages, 2 figures, published version
arxiv created 2011/11/30 · arxiv updated 2013/01/10
We propose a method to coherently transfer quantum information, and to create entanglement, between topological qubits and conventional spin qubits. Our suggestion 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, we show how a topological superconductor can be used to facilitate long-distance quantum information transfer and entanglement between spatially separated spin qubits.