Independent, extensible control of same-frequency superconducting qubits by selective broadcasting

被引：37

作者：

Asaad, Serwan ^{[1
,2
]}

Dickel, Christian ^{[1
,2
]}

Langford, Nathan K. ^{[1
,2
]}

Poletto, Stefano ^{[1
,2
]}

Bruno, Alessandro ^{[1
,2
]}

Rol, Michiel Adriaan ^{[1
,2
]}

Deurloo, Duije ^{[1
,3
]}

DiCarlo, Leonardo ^{[1
,2
]}

机构：

[1] Delft Univ Technol, QuTech, Delft, Netherlands

[2] Delft Univ Technol, Kavli Inst Nanosci, Delft, Netherlands

[3] Netherlands Org Appl Sci Res TNO, Delft, Netherlands

来源：

NPJ QUANTUM INFORMATION | 2016年 / 2卷

关键词：

QUANTUM PROCESSOR; ERROR-DETECTION; CIRCUITS;

D O I：

10.1038/npjqi.2016.29

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

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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