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Regensburg 2019 – scientific programme

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TT: Fachverband Tiefe Temperaturen

TT 58: Superconductivity: Qubits 2

TT 58.5: Talk

Thursday, April 4, 2019, 16:00–16:15, Theater

Observation of dissipation driven geometric phase in superconducting microwave resonators — •Vasilii Sevriuk1, Kuan Tan1, Shumpei Masuda1,2, Arto Viitanen1, Mate Jenei1, Matti Partanen1, Matti Silveri1,3, Jan Goetz1, Eric Hyyppä1, Leif Grönberg4, and Mikko Möttönen11QCD Labs, Department of Applied Physics, Aalto University, Espoo, Finland — 2Collage of Liberal Arts and Sciences, Tokyo Medical and Dental University, Ichikawa, Japan — 3Research Unit of Nano and Molecular Systems, University of Oulu, Finland — 4VTT Technical Research Centre of Finland, QFT Center of Excellence, Espoo, Finland

We recently introduced quantum-circuit refrigerator (QCR) [1] which gives possibility to tune dissipation of superconducting circuits. In this work we present an experiment in which coplanar waveguide resonator is capacitively coupled to a QCR on the one end, and to the transmission line on the other end. Coupled to the microwave resonator, QCR creates topologically nontrivial parameter space for the transmission line input-output relationship. In this work we utilize this feature to create a dynamical geometrical phase in a probe signal reflected from the superconducting resonator. Here we present our observation of this effect in a form of an additional tone, created by a frequency shift of the probe signal.
K. Y. Tan, et al., Nat. Commun. 8, 15189 (2017)

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