Berlin 2024 – wissenschaftliches Programm
Bereiche | Tage | Auswahl | Suche | Aktualisierungen | Downloads | Hilfe
TT: Fachverband Tiefe Temperaturen
TT 19: Quantum Coherence (joint session TT/DY)
TT 19.3: Vortrag
Montag, 18. März 2024, 17:00–17:15, H 3025
Characterization of hyperfine transitions of rare-earth spin ensembles via broadband ESR spectroscopy at mK temperatures — •Ana Strinic1,2,3, Patricia Oehrl1,2,3, Owen Huisman4, Hans Huebl1,2,3, Rudolf Gross1,2,3, and Nadezhda Kukharchyk1,2,3 — 1Walther-Meissner-Institute, Bavarian Academy of Sciences and Humanities, Garching, Germany — 2School of Natural Sciences, Technical University of Munich, Garching, Germany — 3Munich Center for Quantum Science and Technologies, Munich, Germany — 4Delft University of Technology, Delft, The Netherlands
Hybrid quantum systems consisting of a superconducting quantum processor coupled to a quantum memory (QM) offer great potential for quantum computing [1]. For interfacing the two components, a microwave (mw) QM is advantageous, since losses due to frequency transduction can be avoided. A potential platform for mw QMs are rare-earth spin ensembles, due to their hyperfine transitions in the GHz regime, which exhibit long coherence times [2]. In this work, we study the hyperfine transitions in 167Er:7LiYF4 using broadband microwave spectroscopy employing a coplanar waveguide. The high resolution ESR spectra obtained at 10 mK allow to quantify the parameters of the spin Hamiltonian, in particular the hyperfine and quadrupole coefficients. Moreover, this technique allows to directly address various hyperfine transitions at their zero first-order Zeeman points, which is key for the implementation of mw QM schemes.
[1] E. Gouzien, N. Sangouard, Phys. Rev. Lett. 127 (2021) 140503
[2] P.Y. Li et al., Phys. Rev. Appl. 13, 024080 (2020)
Keywords: Rare earth spin ensemble; Broadband ESR; Quantum memory