TY  - JOUR
PB  - SciPost Foundation
DO  - 10.21468/SciPostPhys.17.3.074
TI  - Flux-tunable hybridization in a double quantum dot interferometer
PY  - 2024/09/06
UR  - https://scipost.org/SciPostPhys.17.3.074
JF  - SciPost Physics
JA  - SciPost Phys.
VL  - 17
IS  - 3
SP  - 074
A1  - Prosko, Christian
AU  - Kulesh, Ivan
AU  - Chan, Michael
AU  - Han, Lin
AU  - Xiao, Di
AU  - Thomas, Candice
AU  - Manfra, Michael
AU  - Goswami, Srijit
AU  - Malinowski, Filip K.
AB  - Quantum interference of electron tunneling occurs in any system where multiple tunneling paths connect states. This unavoidably arises in two-dimensional semiconducting qubit arrays, and must be controlled as a prerequisite for the manipulation and readout of hybrid topological and parity qubits. Studying a loop formed by two quantum dots, we demonstrate a magnetic-flux-tunable hybridization between two electronic levels, an irreducibly simple system where quantum interference is expected to occur. Using radio-frequency reflectometry of the dots’ gate electrodes we extract an interdot coupling exhibiting oscillations with a periodicity of one flux quantum. In different tunneling regimes we benchmark the oscillations’ contrast, and find their amplitude varies with the charge state of the quantum dots. These results establish the feasibility and limitations of parity readout of qubits with tunnel couplings tuned by flux.
ER  -

@Article{10.21468/SciPostPhys.17.3.074,
	title={{Flux-tunable hybridization in a double quantum dot interferometer}},
	author={Christian G. Prosko and Ivan Kulesh and Michael Chan and Lin Han and Di Xiao and Candice Thomas and Michael J. Manfra and Srijit Goswami and Filip K. Malinowski},
	journal={SciPost Phys.},
	volume={17},
	pages={074},
	year={2024},
	publisher={SciPost},
	doi={10.21468/SciPostPhys.17.3.074},
	url={https://scipost.org/10.21468/SciPostPhys.17.3.074},
}