Kammerloher, Eugen and Schmidbauer, Andreas and Diebel, Laura K. and Seidler, Inga and Neul, Malte and Kuenne, Matthias and Ludwig, Arne and Ritzmann, Julian and Wieck, Andreas and Bougeard, Dominique and Schreiber, Lars R. and Bluhm, Hendrik (2024) Sensing dot with high output swing for scalable baseband readout of spin qubits. PHYSICAL REVIEW APPLIED, 22 (2): 024044. ISSN 2331-7019,
Full text not available from this repository. (Request a copy)Abstract
A crucial requirement for quantum computing-in particular, for scalable quantum computing and error correction-is fast and high-fidelity qubit readout. For semiconductor-based qubits, one limiting factor for local low-power signal amplification is the output swing of the charge sensor. We demonstrate GaAs and Si asymmetric sensing dots (ASDs) specifically designed to provide a significantly larger response compared to conventional charge-sensing dots. Our ASD design features a drain reservoir strongly decoupled from the sensor dot, which mitigates negative feedback effects found in conventional sensors. This results in a boosted output swing of 3 mV, which exceeds the response in the conventional regime of our device by more than a factor of 10. The enhanced output signal paves the way for employing very low-power readout amplifiers in close proximity to the qubit.
| Item Type: | Article |
|---|---|
| Uncontrolled Keywords: | ; |
| Subjects: | 500 Science > 530 Physics |
| Divisions: | Physics > Institute of Experimental and Applied Physics > Chair Professor Huber > Group Dominique Bougeard |
| Depositing User: | Dr. Gernot Deinzer |
| Date Deposited: | 17 Nov 2025 13:33 |
| Last Modified: | 17 Nov 2025 13:33 |
| URI: | https://pred.uni-regensburg.de/id/eprint/64860 |
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