Double-sided coaxial circuit QED with out-of-plane wiring
Double-sided coaxial circuit QED with out-of-plane wiring
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DOI：
10.1063/1.4984299
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发表时间：
2017-03
影响因子：
4
通讯作者：
Joseph Rahamim;T. Behrle;M. Peterer;A. Patterson;P. Spring;T. Tsunoda;R. Manenti;G. Tancredi;P. Leek
中科院分区：
文献类型：
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作者：
Joseph Rahamim;T. Behrle;M. Peterer;A. Patterson;P. Spring;T. Tsunoda;R. Manenti;G. Tancredi;P. Leek
超导电路是发展量子计算的有力候选平台。为了发展到实际有用的水平，需要将多个量子比特的阵列与选择性的量子比特控制和读出相结合的体系结构，而不会影响一致性。在这里，我们提出了一种同轴电路量子电动力学结构，在该结构中，量子比特和谐振器被制造在单个芯片的两侧，控制和读出线路由垂直于芯片平面的同轴线路提供。我们给出了一种制作的器件的特性测量结果，与模拟参数很好地吻合，并且得到了能量弛豫和退相时间分别为T1=4.1μ的S和T2=5.7μ的S。该体系结构允许扩展到选择性控制和测量的量子比特的大阵列，其优点是所有布线都在平面外。
Superconducting circuits are well established as a strong candidate platform for the development of quantum computing. In order to advance to a practically useful level, architectures are needed which combine arrays of many qubits with selective qubit control and readout, without compromising on coherence. Here, we present a coaxial circuit quantum electrodynamics architecture in which qubit and resonator are fabricated on opposing sides of a single chip, and control and readout wiring are provided by coaxial wiring running perpendicular to the chip plane. We present characterization measurements of a fabricated device in good agreement with simulated parameters and demonstrating energy relaxation and dephasing times of T1 = 4.1 μs and T2 = 5.7 μs, respectively. The architecture allows for scaling to large arrays of selectively controlled and measured qubits with the advantage of all wiring being out of the plane.