2019/01/31 by Pascal Cerfontaine, René Otten, M. A. Wolfe +2 · 31 citations
Computer Science · Engineering · Physics and Astronomy · #Advancements in Semiconductor Devices and Circuit Design #Computer science #Coupling (piping) #Electrical engineering #Engineering #High fidelity #Materials science #Optoelectronics #Physics #Quantum #Quantum Computing Algorithms and Architecture #Quantum and electron transport phenomena #Quantum computer #Quantum gate #Quantum mechanics #Qubit #Scalability #Set (abstract data type) #Singlet state #Superconducting quantum computing #Topology (electrical circuits) #cond-mat.mes-hall #quant-ph
paper · pdf · doi:10.1103/physrevb.101.155311
published in Physical review. B./Physical review. B 101(15) (American Physical Society) · 11 pages, 10 figures, 6 tables. Reprinted with permission from Pascal Cerfontaine, René Otten, M. A. Wolfe, Patrick Bethke, and Hendrik Bluhm, Physical Review B 101, 155311 (2020). Copyright 2020 by the American Physical Society
openalex publication_date 2020/04/28 · arxiv created 2021/01/22 · arxiv updated 2021/01/25 · openalex created_date 2025/10/10 · openalex updated_date 2026/08/05
In order to enable semiconductor-based quantum computing with many qubits, issues like residual interqubit coupling and constraints from scalable control hardware need to be tackled to retain the high gate fidelities demonstrated in current single-qubit devices. Here we focus on two exchange-coupled singlet-triplet spin qubits, considering realistic control hardware as well as Coulomb and exchange coupling that cannot be fully turned off. Using measured noise spectra, we optimize realistic control pulses and show that two-qubit (single-qubit) gate fidelities of 99.90% (\ensuremath≥99.69%) can be reached in GaAs, while 99.99% (\ensuremath≥99.95%) can be achieved in Si.