All-Electrical Quantum Computation with Mobile Spin Qubits

TL;DR

This paper proposes a solid-state quantum computing approach using mobile spin qubits manipulated by electric fields, with analysis of implementation feasibility and error susceptibility.

Contribution

It introduces a novel all-electrical method for quantum gates in spin qubits within one-dimensional systems, integrating recent spintronics advances.

Findings

Electric fields enable universal quantum gates via spin-orbit and exchange interactions.

Numerical simulations estimate the error vulnerability of the proposed system.

Assessment of nanomaterials suitability for implementation.

Abstract

We describe and discuss a solid state proposal for quantum computation with mobile spin qubits in one-dimensional systems, based on recent advances in spintronics. Static electric fields are used to implement a universal set of quantum gates, via the spin-orbit and exchange couplings. Initialization and measurement can be performed either by spin injection from/to ferromagnets, or by using spin filters and mesoscopic spin polarizing beam-splitters. The vulnerability of this proposal to various sources of error is estimated by numerical simulations. We also assess the suitability of various materials currently used in nanotechnology for an actual implementation of our model.