SKM 2023 – wissenschaftliches Programm
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MA: Fachverband Magnetismus
MA 40: Poster Magnetism II
MA 40.35: Poster
Donnerstag, 30. März 2023, 14:00–16:00, P2/EG
Generating small magnetic fields inside an open-end magnetic shielding with a superconducting solenoid magnet — •Lukas Vogl1,2, Ana Strinc1,2,3, Franz Haslbeck1, Rudolf Gross1,2,3, and Nadezhda Kukharchyk1,2,3 — 1Walther-Meißner-Institut, Bayerische Akademie der Wissenschaften, Garching, Germany — 2Physik-Department, Technische Universität München, Garching, Germany — 3Munich Center for Quantum Science and Technologies, München, Germany
Quantum memory is an essential part for the development of quantum computers. One of the most promising realisation of quantum memories has been realised for storage of optical photons in rare-earth-doped crystals, reaching a storage time of 6 hours. The long storage time has been achieved due to working at the zero first-order Zeeman shift point (ZEFOZ). At this point, the phase-sensitivity of a spin system to the magnetic field fluctuations is strongly reduced, and thus longer coherence times can be achieved. Such ZEFOZ transitions are present in the hyperfine states of rare earth ions close to zero magnetic fields, which enables the design of quantum memories compatible with the zero-field environments required for superconducting quantum computing curcuits. Here, we present a setup for a highly controllable homogeneous magnetic environment with additional shielding from external background magnetic fields. This environment will allow for precise control of the magnetic field at the sample position, fine tuning to the ZEFOZ transitions, and additional protection of the superconducting quantum circuits from the fields applied to the rare earth spins.