Review of performance metrics of spin qubits in gated semiconducting nanostructures

Abstract

This Technical Review collects values of selected performance characteristics of semiconductor spin qubits defined in electrically controlled nanostructures. The characteristics are envisaged to serve as a community source for the values of figures of merit with agreed definitions allowing the comparison of different spin-qubit platforms. We include characteristics on the qubit coherence, speed, fidelity and qubit size of multi-qubit devices. The focus is on collecting and curating the values of these characteristics as reported in the literature, rather than on their motivation or significance. Spin qubits hosted in semiconducting nanostructures controlled and probed electrically are among platforms pursued to serve as quantum computing hardware. This Technical Review surveys experimentally achieved values on coherence, speed, fidelity and multi-qubit array size, reflecting the progress of semiconducting spin qubits over the past two decades. Spin qubits hosted in semiconducting nanostructures controlled and probed electrically are among platforms pursued to serve as quantum computing hardware. Their prospect for scalability stems from their versatility and compatibility with modern silicon industrial fabrication. To serve as quantum hardware, qubits have to fulfil a number of stringent criteria concerning their operation, stability and interactions. The overview of experimentally achieved values on coherence, speed, fidelity and multi-qubit array size quantifies the progress of semiconducting spin qubits over the past two decades. Spin qubits hosted in semiconducting nanostructures controlled and probed electrically are among platforms pursued to serve as quantum computing hardware. Their prospect for scalability stems from their versatility and compatibility with modern silicon industrial fabrication. To serve as quantum hardware, qubits have to fulfil a number of stringent criteria concerning their operation, stability and interactions. The overview of experimentally achieved values on coherence, speed, fidelity and multi-qubit array size quantifies the progress of semiconducting spin qubits over the past two decades.