2014/12/31 by Xin Wang, Edwin Barnes, S. Das Sarma +1 · 2 citations
Computer Science · Materials Science · Physics and Astronomy · #Chemical and Physical Properties of Materials #Coupling (piping) #Noise (video) #Quantum Computing Algorithms and Architecture #Quantum and electron transport phenomena #Quantum computer #Quantum decoherence #Quantum gate #Qubit #Scalability #Spin (aerodynamics) #Superconducting quantum computing #cond-mat.mes-hall #quant-ph
paper · pdf · doi:10.1038/npjqi.2015.3
published as npj Quantum Information 1, 15003 (2015) · 9+ pages, 4 figures. To be published in npj Quantum Information
arxiv created 2015/05/13 · openalex publication_date 2015/10/26 · arxiv updated 2015/10/29 · openalex created_date 2016/06/24 · openalex updated_date 2026/08/05
Abstract Capacitively coupled semiconductor spin qubits hold promise as the building blocks of a scalable quantum computing architecture with long-range coupling between distant qubits. However, the two-qubit gate fidelities achieved in experiments to date have been severely limited by decoherence originating from charge noise and hyperfine interactions with nuclear spins, and are currently unacceptably low for any conceivable multi-qubit gate operations. Here, we present control protocols that implement two-qubit entangling gates while substantially suppressing errors due to both types of noise. These protocols are obtained by making simple modifications to control sequences already used in the laboratory and should thus be easy enough for immediate experimental realisation. Together with existing control protocols for robust single-qubit gates, our results constitute an important step toward scalable quantum computation using spin qubits in semiconductor platforms.