Regensburg 2019 – wissenschaftliches Programm
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TT: Fachverband Tiefe Temperaturen
TT 58: Superconductivity: Qubits 2
TT 58.5: Vortrag
Donnerstag, 4. April 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 Möttönen1 — 1QCD 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)