Democratizing Spin Qubits

Abstract

I've been building Powerpoint-based quantum computers with electron spins in silicon for 20 years. Unfortunately, real-life-based quantum dot quantum computers are harder to implement. Materials, fabrication, and control challenges still impede progress. The way to accelerate discovery is to make and measure more qubits. Here I discuss separating the qubit realization and testing circuitry from the materials science and on-chip fabrication that will ultimately be necessary. This approach should allow us, in the shorter term, to characterize wafers non-invasively for their qubit-relevant properties, to make small qubit systems on various different materials with little extra cost, and even to test spin-qubit to superconducting cavity entanglement protocols where the best possible cavity quality is preserved. Such a testbed can advance the materials science of semiconductor quantum information devices and enable small quantum computers. This article may also be useful as a light and light-hearted introduction to quantum dot spin qubits.

or, How to make semiconductor-based quantum computers without fabricating quantum dot qubits; Based on talks I gave at the ARO/LPS Quantum Computing Program Review, August 2018, and 4th School and Conference on Spin-Based Quantum Information Processing, September 2018. Comments and feedback welcome

References in corpus (18)

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Cited by in corpus (7)

• Semiconductor Qubits In Practice
• Review of performance metrics of spin qubits in gated semiconducting nanostructures
• Probing single electrons across 300 mm spin qubit wafers
• Democratization of Quantum Technologies
• Open Hardware Solutions in Quantum Technology
• Optimization of Quantum-dot Qubit Fabrication via Machine Learning
• Experimental online quantum dots charge autotuning using neural networks