Realization of Microwave Quantum Circuits Using Hybrid Superconducting-Semiconducting Nanowire Josephson Elements
Realization of Microwave Quantum Circuits Using Hybrid Superconducting-Semiconducting Nanowire Josephson Elements
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DOI：
10.1103/physrevlett.115.127002
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发表时间：
2015-09-14
影响因子：
8.6
通讯作者：
DiCarlo, L.
中科院分区：
文献类型：
--
作者：
de Lange, G.;van Heck, B.;DiCarlo, L.
我们报告的实现量子微波电路使用混合超导半导体约瑟夫森元件组成的InAs纳米线接触NbTiN。电容性分流的单个元件表现为具有电可调过渡频率的transmon电路。二元电路在零磁通附近也表现出类似transmon的行为，但在磁通量子的一半处表现为磁通量子比特，其中元件中的非正弦电流-相位关系产生双阱约瑟夫森势。这些混合约瑟夫森元件是有前途的应用需要微波超导电路工作在磁场中。
We report the realization of quantum microwave circuits using hybrid superconductor-semiconductor Josephson elements comprised of InAs nanowires contacted by NbTiN. Capacitively shunted single elements behave as transmon circuits with electrically tunable transition frequencies. Two-element circuits also exhibit transmonlike behavior near zero applied flux but behave as flux qubits at half the flux quantum, where nonsinusoidal current-phase relations in the elements produce a double-well Josephson potential. These hybrid Josephson elements are promising for applications requiring microwave superconducting circuits operating in a magnetic field.