Regensburg 2022 – scientific programme

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QI: Fachverband Quanteninformation

QI 1: Implementations: Spin Qubits, Atoms, and Photons

QI 1.3: Talk

Monday, September 5, 2022, 10:15–10:30, H8

Microwave spectroscopy of rare earth spin ensembles at zero magnetic field — •Ana Strinic^1,2, Kirill G. Fedorov^1,2, Rudolf Gross^1,2,3, and Nadezhda Kukharchyk^1,3 — ¹Walther-Meißner-Institut, Bayerische Akademie der Wissenschaften, Garching, Germany — ²Physik-Department, Technische Universität München, Garching, Germany — ³Munich Center for Quantum Science and Technologies, Munich, Germany

Operating at microwave frequencies and in the absence of external magnetic fields, superconducting circuits show exceptional potential for the development of quantum processors. Realizing a quantum memory, which operates in the microwave regime and in the vicinity of zero magnetic field, would allow for a direct interface to such quantum processors. In this regard, rare earth doped crystals are highly attractive, as they exhibit long optical and spin coherence times and possess transitions in the microwave frequency range [1,2]. In order to identify transitions, which form a suitable quantum memory scheme, we have performed microwave spectroscopy on a ¹⁶⁷Er:⁷LiYF₄ crystal in a magnetically shielded environment. The experimental findings of the spectroscopy study are then compared to simulations of the spin Hamiltonian. [1] N. Kukharchyk et al. New J. Phys. 20, 023044 (2018) [2] J.V. Rakonjac et al. Phys. Rev. B 101, 184430 (2020)