SKM 2023 – wissenschaftliches Programm

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TT: Fachverband Tiefe Temperaturen

TT 39: Superconducting Electronics

TT 39.7: Vortrag

Mittwoch, 29. März 2023, 17:00–17:15, HSZ 304

Fabrication of low-loss Josephson parametric circuits — •Kedar E. Honasoge^1,2, Yuki Nojiri^1,2, Daniil E. Bazulin^1,2, Leon Koch^1,2, Thomas Luschmann^1,2, Niklas Bruckmoser^1,2, Maria-Teresa Handschuh¹, Florian Fesquet^1,2, Michael Renger^1,2, Fabian Kronowetter^1,2,4, Achim Marx¹, Rudolf Gross^1,2,3, and Kirill G. Fedorov^1,2 — ¹Walther-Meißner-Institut, 85748 Garching, Germany — ²Physik- Department, Technische Universität München, 85748 Garching, Germany — ³Munich Center for Quantum Science and Technology (MCQST), 80799 München, Germany — ⁴Rohde & Schwarz GmbH, 81671 München, Germany

The emergence of quantum information processing with superconducting circuits has stimulated the development of various interest in Josephson parametric devices. The latter offer a wide range of applications ranging from quantum-limited amplification to the generation of entangled squeezed states of light. We fabricate low-loss devices by employing careful cleaning steps during the fabrication of the superconducting circuits. Upon optimization, we fabricate Josephson parametric devices with internal quality factors in excess of 10⁵. We characterize bandwidth, gain, noise, dynamic range, and other properties of the realized devices. Based on these investigations, we derive useful criteria for the development of more intricate devices incorporating Josephson parametric circuits.