Quantum Superinductor with Tunable Nonlinearity
Quantum Superinductor with Tunable Nonlinearity
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DOI：
10.1103/physrevlett.109.137003
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发表时间：
2012-09-27
影响因子：
8.6
通讯作者：
Gershenson, M. E.
中科院分区：
文献类型：
--
作者：
Bell, M. T.;Sadovskyy, I. A.;Gershenson, M. E.
我们报告了超级电感器的实现，这是一种无耗散元件，其微波阻抗大大超过电阻量子 R-Q。超级电感器的设计以纳米级约瑟夫森结的阶梯形式实现，可以通过弱磁场调节电感及其非线性。基于超电感的量子位的拉比衰变时间超过1μs。高动态电感和强非线性提供了新型功能，包括开发免受通量和电荷噪声影响的量子位、容错量子计算以及基于布洛赫振荡的电流标准的高阻抗隔离。
We report on the realization of a superinductor, a dissipationless element whose microwave impedance greatly exceeds the resistance quantum R-Q. The design of the superinductor, implemented as a ladder of nanoscale Josephson junctions, enables tuning of the inductance and its nonlinearity by a weak magnetic field. The Rabi decay time of the superinductor-based qubit exceeds 1 mu s. The high kinetic inductance and strong nonlinearity offer new types of functionality, including the development of qubits protected from both flux and charge noises, fault tolerant quantum computing, and high-impedance isolation for electrical current standards based on Bloch oscillations.