Quantum information transfer between topological and spin qubit systems

Details Quantum information transfer between topological and spin qubit systems Quantum information transfer between topological and spin qubit systems

2011-07-28

arxiv.org/abs/1107.5703v2

Phys. Rev. Lett. 107, 210502 (2011)

Physics

Condensed Matter

Superconductivity

4+ pages, 2 figures, published version

Scientific paper

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.

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