TY  - EJOUR
AU  - Xue, Ran
AU  - Beer, Max
AU  - Seidler, Inga
AU  - Humpohl, Simon
AU  - Tu, Jhih-Sian
AU  - Trellenkamp, Stefan
AU  - Struck, Tom
AU  - Bluhm, Hendrik
AU  - Schreiber, Lars R.
TI  - Si/SiGe QuBus for single electron information-processing devices with memory and micron-scale connectivity function
PB  - arXiv
M1  - FZJ-2024-01624
PY  - 2023
AB  - The connectivity within single carrier information-processing devices requires transport and storage of single charge quanta. Our all-electrical Si/SiGe shuttle device, called quantum bus (QuBus), spans a length of 10 $\mathrmμ$m and is operated by only six simply-tunable voltage pulses. It operates in conveyor-mode, i.e. the electron is adiabatically transported while confined to a moving QD. We introduce a characterization method, called shuttle-tomography, to benchmark the potential imperfections and local shuttle-fidelity of the QuBus. The fidelity of the single-electron shuttle across the full device and back (a total distance of 19 $\mathrmμ$m) is $(99.7 \pm 0.3)\,\%$. Using the QuBus, we position and detect up to 34 electrons and initialize a register of 34 quantum dots with arbitrarily chosen patterns of zero and single-electrons. The simple operation signals, compatibility with industry fabrication and low spin-environment-interaction in $^{28}$Si/SiGe, promises spin-conserving transport of spin qubits for quantum connectivity in quantum computing architectures.
KW  - Mesoscale and Nanoscale Physics (cond-mat.mes-hall) (Other)
KW  - Quantum Physics (quant-ph) (Other)
KW  - FOS: Physical sciences (Other)
LB  - PUB:(DE-HGF)25
DO  - DOI:10.48550/ARXIV.2306.16375
UR  - https://juser.fz-juelich.de/record/1023043
ER  -