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QI: Fachverband Quanteninformation

QI 11: Semiconductor Spin Qubits II: Si, Ge, and Color Centers

QI 11.1: Invited Talk

Tuesday, March 11, 2025, 11:00–11:30, HS II

Systematic High-Fidelity Operation and Transfer in Semiconductor Spin-Qubits — •Maximilian Rimbach-Russ — QuTech and Kavli Institute of Nanoscience, Delft University of Technology, Delft, The Netherlands

Spin-based semiconductor quantum dot qubits are a promising contender for realizing a fault-tolerant quantum processor. Their similarity to classical transistor allows for industrial fabrication techniques, relevant for scaling to fault-tolerant device sizes.

Recent developments have shown that high-fidelity shuttling, movement of the charge carrier while preserving spin-coherence, can be experimentally realized [1]. At the same time, novel control mechanisms that make full use of artificial or intrinsic spin-orbit interaction can be used to enable power efficient, fast, and high-fidelity quantum control [2,3,4]. Furthermore, optimized pulse control allows for an additional dynamic protection and speed to further increase the fidelity of qubit transfer and operations [5,6].

[1] M. De Smet et al., arXiv:2406.07267.

[2] C.-A. Wang et al., Science 385, 6707, 447 (2024)

[3] M. Rimbach-Russ et al., arXiv:2412.13658.

[4] V. John et al., arXiv:2412.16044.

[5] M. Rimbach-Russ, S.G.J. Philips, X. Xue, and L.M.K. Vandersypen, Quantum Sci. Technol. 8, 045025 (2023).

[6] C. V. Meinersen, S. Bosco, and M. Rimbach-Russ, arXiv:2409.03084.

Keywords: condensed matter physics; quantum computation; spin qubit; gate defined quantum dots; electrons and holes in silicon-germanium