Berlin 2018 – wissenschaftliches Programm
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TT: Fachverband Tiefe Temperaturen
TT 61: Superconductivity: Superconducting Electronics II and Cryotechnique
TT 61.2: Vortrag
Mittwoch, 14. März 2018, 15:30–15:45, H 2053
Bi-stability in a Mesoscopic Josephson Junction Array resonator — •Phani Raja Muppalla1,2, Oscar Gargiulo1,2, Mathieu Juan1,2, Lukas grunehaupt3, Gerhard Kirchmair1,2, and Ioan Pop3 — 1Insitute for quantum optics and quntum information, technikerstrasse 21 A, Innsbruck- Austria — 2university of innsbruck, innsbruck, Austri — 3Karlsruhe Institute of Technology, Karlsruhe, Germany
We present an experimental analysis of the Kerr effect of extended plasma resonances in a mesoscopic Josephson junction (JJ) chain resonator inside a rectangular waveguide. The Kerr effect manifests itself as a frequency shift that depends linearly on the number of photons in a resonant mode. We study the bi-stable behavior, using a pump probe scheme on two modes of the JJ array, exploiting the Cross-Kerr effect in our system. In order to understand the behavior of the bi-stability we perform continuous time measurements to observe the switching between the two metastable states. We observe a strong dependence of the switching rates on the photon number and the drive frequency.