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Published on: August 2, 2019
Quantum superinductor with tunable nonlinearity
M T Bell1, I A Sadovskyy, L B Ioffe
1Department of Physics and Astronomy, Rutgers University, Piscataway, New Jersey 08854, USA.
Abstract:
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 μs. 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.
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