High Kinetic Inductance Nb N Nanowire Superinductors
Artikel i vetenskaplig tidskrift, 2019

We demonstrate that a high kinetic inductance disordered-superconductor nanowire can realize a circuit element - known as a superinductor - with a characteristic impedance greater than the quantum resistance (RQ=h/4e2≃6.5kΩ) and a quality factor of 25 000 at single-photon excitation. By examining loss rates, we demonstrate that the microwave dissipation can be fully understood in the framework of two-level-system dielectric loss. Superinductors can suppress the quantum fluctuations of charge in a circuit, which has applications, for example, in devices for quantum computing, photon detection, and other sensors based on mesoscopic circuits.

Characteristic impedance

Dielectric losses

Superconducting materials


David Niepce

Chalmers, Mikroteknologi och nanovetenskap (MC2), Kvantteknologi

Jonathan Burnett

Chalmers, Mikroteknologi och nanovetenskap (MC2), Kvantteknologi

Jonas Bylander

Chalmers, Mikroteknologi och nanovetenskap (MC2), Kvantteknologi

Physical Review Applied

2331-7019 (eISSN)

Vol. 11 4 044014


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