SKM 2023 – wissenschaftliches Programm
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TT: Fachverband Tiefe Temperaturen
TT 54: Quantum Coherence and Quantum Information Systems II
TT 54.10: Vortrag
Donnerstag, 30. März 2023, 17:30–17:45, HSZ 304
Fabrication of a superconducting transmission line in a planar design on a spin-doped crystalline membrane — •Georg Mair1,2, Ana Strinic1,2,3, Niklas Bruckmoser1,2, Michael Stanger1, Andreas Erb1,2, Rudolf Gross1,2,3, and Nadezhda Kukharchyk1,2,3 — 1Technical University of Munich, TUM School of Natural Sciences, Physics Department, 85747 Garching, Germany — 2Walther-Meissner-Institut, Bayerische Akademie der Wissenschaften, 85748 Garching, Germany — 3Munich Center for Quantum Science and Technology, 80799 Munich, Germany
Scaling up the density of superconducting qubits on a chip is reaching its limits, and a supplementing microwave quantum memory is a promising way to enhance the computing power [1]. Rare-earth doped crystals are potential candidates to realize such microwave quantum memories, due to the long coherence times of their spin states [2]. For efficient operation, one needs to have precise control over the distribution of strength and orientation of the oscillating magnetic field inside the sample. Here, we introduce a novel, planar superconducting transmission line design based on a thin crystalline CaWO4 membrane. The transmission line is designed to exhibit high transmission in the range of 1−8 GHz, i.e. the frequency range of the hyperfine transitions of the rare-earth ions in near-zero external magnetic field. Fabrication techniques are explained and transmission spectra recorded at cryogenic temperatures are discussed.
[1] É. Gouzien and N. Sangouard, Phys. Rev. Lett. 127, 140503 (2021)
[2] N. Kukharchyk et al. New J. Phys. 20, 023044 (2018)