Regensburg 2019 – wissenschaftliches Programm
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TT: Fachverband Tiefe Temperaturen
TT 49: Poster Session: Superconductivity
TT 49.48: Poster
Mittwoch, 3. April 2019, 15:00–18:30, Poster D
Helimagnons meet circuit quantum electrodynamics — •Mohammad T. Amawi1,2, Philip Schmidt1,2,3, Aisha Aqeel2, Christian Back2,3, Rudolf Gross1,2,3, and Hans Huebl1,2,3 — 1Walther-Meißner-Institut, Bayerische Akademie der Wissenschaften, Germany — 2Physik-Departement, Technische Universität München, Garching, Germany — 3Nanosystems Initiative Munich, München, Germany
A wealth of hybrid quantum systems is discussed in the context of converting quantum information between various frequency domains, such as from microwave to optical frequencies. Besides conversion concepts based on opto-mechanics or electromechanics, the strong coupling regime of spin excitations interacting with microwave resonators offers an alternative pathway to this goal.
We present a hybrid system consisting of tunable resonators and a helimagnonic mode . The tunable resonator is a superconducting coplanar microwave resonator shunted to ground via a dc-SQUID. Thus the resonator is frequency tunable using a magnetic field bias. At low temperatures and close to zero magnetic field helimagnetic modes form in Cu2OSeO3 (CSO) crystals, as the system orders magnetically in a helical spin structure. We investigate the magnetization dynamics of the CSO as millikelvin temperatures using broadband techniques and present initial results regarding the coupling of CSO to flux-tunable microwave resonators.