Bulletin of the American Physical Society
APS March Meeting 2023
Volume 68, Number 3
Las Vegas, Nevada (March 5-10)
Virtual (March 20-22); Time Zone: Pacific Time
Session EE03: V: Semiconductor Qubits
10:00 AM–11:24 AM,
Monday, March 20, 2023
Room: Virtual Room 3
Sponsoring
Unit:
DQI
Chair: Biswajit Datta, City university of New York
Abstract: EE03.00002 : cQED with grAl resonators and hole spins in germanium*
10:12 AM–10:24 AM
Presenter:
Marián Janík
(Institute of Science and Technology Austria (ISTA), 3400 Klosterneuburg, Austria)
Authors:
Marián Janík
(Institute of Science and Technology Austria (ISTA), 3400 Klosterneuburg, Austria)
Carla Nataly Borja Espinosa
(Institute of Science and Technology Austria (ISTA), 3400 Klosterneuburg, Austria)
Oliver Sagi
(Institute of Science and Technology Austria (ISTA), 3400 Klosterneuburg, Austria)
Andrea Ballabio
(L-NESS, Physics Department, Politecnico di Milano, 22100 Como, Italy)
Pasquale Scarlino
(Institute of Physics, École Polytechnique Fédérale de Lausanne (EPFL), CH-1015 Lausanne, Switzerland)
Ioan M Pop
(Karlsruhe Institute of Technology (KIT), 76131 Karlsruhe, Germany)
Daniel Chrastina
(L-NESS, Physics Department, Politecnico di Milano, 22100 Como, Italy)
Giovanni Isella
(L-NESS, Physics Department, Politecnico di Milano, 22100 Como, Italy)
Georgios Katsaros
(Institute of Science and Technology Austria (ISTA), 3400 Klosterneuburg, Austria)
Here we report on hole double quantum dots (DQD) hosted in Ge/SiGe heterostructure coupled to a granular aluminum (grAl) resonator. grAl offers high kinetic inductance, magnetic field resilience and compatibility with multilayer lift-off based fabrication [5]. Assessing these properties, we demonstrate a resonator with a characteristic impedance of Z0 ~ 13 k?, due to the large kinetic inductance of Lkin ~ 2 nH/sq, resilient to out-of-plane magnetic fields exceeding Bperp ~ 280 mT with κ/2π < 5 MHz, well suited for spin-photon coupling experiments. We will also present our recent results of integrating these resonators with germanium DQDs in a cQED architecture, which aims for long-range coupling of hole spin qubits.
[1] Scappucci, G. et al. Nat. Rev. Mater. 6, 926-943 (2021).
[2] Yu, C. X. et al. arXiv:2206.14082 (2022).
[3] Mi, X. et al. Science 355, 156-158 (2017).
[4] Harvey-Collard, P. et al. Phys. Rev. X 12, 021026 (2022).
[5] Grünhaupt, L. et al. Nat. Mater. 18, 816-819 (2019).
*FWF; NOMIS Foundation; TOPSQUAD
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