期刊
NPJ QUANTUM INFORMATION
卷 2, 期 -, 页码 -出版社
NATURE PUBLISHING GROUP
DOI: 10.1038/npjqi.2016.29
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资金
- Dutch Organization for Fundamental Research on Matter (FOM)
- Netherlands Organisation for Scientific Research (NWO/OCW)
- Netherlands Organisation for Scientific Research (Vidi scheme)
- EU FP7 project ScaleQIT
- ERC Synergy Grant
- Marie Curie Career Integration Grant
A critical ingredient for realising large-scale quantum information processors will be the ability to make economical use of qubit control hardware. We demonstrate an extensible strategy for reusing control hardware on same-frequency transmon qubits in a circuit QED chip with surface-code-compatible connectivity. A vector switch matrix enables selective broadcasting of input pulses to multiple transmons with individual tailoring of pulse quadratures for each, as required to minimise the effects of leakage on weakly anharmonic qubits. Using randomised benchmarking, we compare multiple broadcasting strategies that each pass the surface-code error threshold for single-qubit gates. In particular, we introduce a selective broadcasting control strategy using five pulse primitives, which allows independent, simultaneous Clifford gates on arbitrary numbers of qubits.
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