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Lukas Grünhaupt

Granular aluminium superinductors

(Experimental Condensed Matter Physics ; 26)

AutorGrünhaupt, Lukas

VerlagKIT Scientific Publishing, Karlsruhe

ISBN9783731509561

UmfangVIII, 146 S.

Veröffentlicht
am:
24.10.2019

Erscheinungs-
jahr
2019

Verfügbarkeit04

Downloads:

Für Zitate bitte die folgende URL verwenden:
http://dx.doi.org/10.5445/KSP/1000097320

Abstract

We investigate superconducting granular aluminum (grAl) as a promising material for quantum circuits. We show that grAl strips can reach kinetic inductances up to nH/sq, while maintaining small microwave frequency losses. We identify excess quasiparticles as a limiting loss mechanism, and find quasiparticle relaxation times on the order of seconds. By fabricating a fluxonium quantum bit with a grAl superinductor, we demonstrate that grAl is a viable material for superconducting quantum circuits.