Is all-electrical silicon quantum computing feasible in the long term?

Abstract

The development of the first generation of commercial quantum computers is based on superconductive qubits and trapped ions respectively. Other technologies such as semiconductor quantum dots, neutral ions and photons could in principle provide an alternative to achieve comparable results in the medium term. It is relevant to evaluate if one or more of them is potentially more effective to address scalability to millions of qubits in the long term, in view of creating a universal quantum computer. We review an all-electrical silicon spin qubit, that is the double quantum dot hybrid qubit, a quantum technology which relies on both solid theoretical grounding on one side, and massive fabrication technology of nanometric scale devices by the existing silicon supply chain on the other.

Accepted for publication on Physics Letters A

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• On the robustness of the hybrid qubit computational gates through simulated randomized benchmarking protocols
• Material matters in superconducting qubits
• Transmission based tomography for spin qubits
• Simulation of a Three-Nucleons System Transition on Quantum Circuits
• Low Temperature Relaxation of Donor Bound Electron Spins in ${}^{28}$Si:P
• Quantum gates in coupled quantum dots controlled by coupling modulation