High-fidelity gate set for exchange-coupled singlet-triplet qubits
Physical review. B./Physical review. B, vol. 101
Abstract
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% ($\ensuremath{\ge}99.69%$) can be reached in GaAs, while 99.99% ($\ensuremath{\ge}99.95%$) can be achieved in Si.
Authors 4
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RWTH Aachen University · Forschungszentrum Jülich · Jülich Aachen Research Alliance
Affiliation as printed
JARA-FIT Institute for Quantum Information, Forschungszentrum Jülich GmbH and RWTH Aachen University, 52074 Aachen, Germany
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RWTH Aachen University · Forschungszentrum Jülich · Jülich Aachen Research Alliance
Affiliation as printed
JARA-FIT Institute for Quantum Information, Forschungszentrum Jülich GmbH and RWTH Aachen University, 52074 Aachen, Germany
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RWTH Aachen University · Forschungszentrum Jülich · Jülich Aachen Research Alliance
Affiliation as printed
JARA-FIT Institute for Quantum Information, Forschungszentrum Jülich GmbH and RWTH Aachen University, 52074 Aachen, Germany
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RWTH Aachen University · Forschungszentrum Jülich · Jülich Aachen Research Alliance
Affiliation as printed
JARA-FIT Institute for Quantum Information, Forschungszentrum Jülich GmbH and RWTH Aachen University, 52074 Aachen, Germany
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