Quantum computation in a quantum-dot-Majorana-fermion hybrid system

Details Quantum computation in a quantum-dot-Majorana-fermion hybrid system Quantum computation in a quantum-dot-Majorana-fermion hybrid system

2012-01-27

arxiv.org/abs/1201.5734v1

Physics

Quantum Physics

Scientific paper

We propose a scheme to implement universal quantum computation in a quantum-dot-Majorana-fermion hybrid system. Quantum information is encoded on pairs of Majorana fermions, which live on the the interface between topologically trivial and nontrivial sections of a quantum nanowire deposited on an s-wave superconductor. Universal single-qubit gates on topological qubit can be achieved. A measurement-based two-qubit Controlled-Not gate is produced with the help of parity measurements assisted by the quantum-dot and followed by prescribed single-qubit gates. The parity measurement, on the quantum-dot and a topological qubit, is achieved by the Aharonov- Casher effect.

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