High Kinetic Inductance NbN Nanowire Superinductors

We demonstrate that a high kinetic inductance disordered superconductor can realize a low microwave loss, non-dissipative circuit element with an impedance greater than the quantum resistance (\(R_Q = h/4e^2 \simeq 6.5k\Omega\)). This element, known as a superinductor, can produce a quantum circuit...

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Bibliographic Details
Published inarXiv.org
Main Authors Niepce, David, Burnett, Jonathan, Bylander, Jonas
Format Paper Journal Article
LanguageEnglish
Published Ithaca Cornell University Library, arXiv.org 05.02.2018
Subjects
Inductance
Nanowires
Niobium nitride
Physics - Mesoscale and Nanoscale Physics
Q factors
Quantum theory
Variation
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Summary:We demonstrate that a high kinetic inductance disordered superconductor can realize a low microwave loss, non-dissipative circuit element with an impedance greater than the quantum resistance (\(R_Q = h/4e^2 \simeq 6.5k\Omega\)). This element, known as a superinductor, can produce a quantum circuit where charge fluctuations are suppressed. The superinductor consists of a 40 nm wide niobium nitride nanowire and exhibits a single photon quality factor of \(2.5 \times 10^4\). Furthermore, by examining loss rates, we demonstrate that the dissipation of our nanowire devices can be fully understood in the framework of two-level system loss.
ISSN:2331-8422
DOI:10.48550/arxiv.1802.01723