4.6 Editorial Material

Opinion: Democratizing Spin Qubits

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QUANTUM
卷 5, 期 -, 页码 -

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VEREIN FORDERUNG OPEN ACCESS PUBLIZIERENS QUANTENWISSENSCHAF
DOI: 10.22331/q-2021-11-18-584

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  1. National Physical Sciences Consortium (NPSC) graduate fellowship

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The author has been building Powerpoint-based quantum computers with electron spins in silicon for 20 years. The challenges in implementing real-life-based quantum dot quantum computers are discussed, with a focus on accelerating discovery by making and measuring more qubits. Separating qubit realization and testing circuitry from materials science and on-chip fabrication is proposed as a way to advance semiconductor quantum information devices and enable small quantum computers.
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.

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