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  1. Jul 25, 2024A large difference in the orientation of the spin quantization axes between quantum dots is essential for hopping-based qubit operations. Holes in planar germanium heterostructures manifest a pronounced anisotropic g-tensor, with an out-of-plane g-factor, g ⊥, that can be two orders of magnitude larger than the in-plane component, g || (20, 24, 26, 27).
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  3. Feb 28, 2024Qubits that can be efficiently controlled are essential for the development of scalable quantum hardware. While resonant control is used to execute high-fidelity quantum gates, the scalability is challenged by the integration of high-frequency oscillating signals, qubit crosstalk and heating. Here, we show that by engineering the hopping of spins between quantum dots with site-dependent spin ...
  4. quantum processors (11-13). The development of local, efficient, low-power control mecha-nisms of semiconductor spins is now a key driver(14-16).Tothisend,qubitsencodedin multiple spins and in multiple quantum dots, such as singlet-triplet, hybrid, and exchange-onlyqubits,havebeeninvestigatedaspossible platforms (2). Although these qubit ...
  5. groovequantum.com

    The main objective of GROOVE is to reproducibly fabricate, test and launch a quantum chip containing 16 high-quality germanium spin qubits. This quantum computer prototype will leverage the small footprint and rapid development of spin qubits in gate-defined quantum dots in combination with the unique properties of the germanium host material.
  6. Operating semiconductor quantum processors with hopping spins. ... That work initiated the field of semiconductor spin qubits and inspired over two decades of extensive research, ... Competing interests: N.W.H. is also affiliated with Groove Quantum BV and declares equity interest. N.W.H. and M.V. are inventors on a patent application (NL ...
  7. pubmed.ncbi.nlm.nih.gov

    Jul 26, 2024Operating semiconductor quantum processors with hopping spins Science. 2024 Jul 26;385(6707):447-452. doi: 10.1126/science.ado5915. ... We also show that hopping spins constitute a tuning method by statistically mapping the coherence of a 10-quantum dot system. Our results show that dense quantum dot arrays with sparse occupation could be ...
  8. repository.tudelft.nl

    Operating semiconductor quantum processors with hopping spins. ... Here, we show that by engineering the hopping of spins between quantum dots with a site-dependent spin quantization axis, quantum control can be established with discrete signals. We demonstrate hopping-based quantum logic and obtain single-qubit gate fidelities of 99.97% ...
  9. inspirehep.net

    Feb 28, 2024Operating semiconductor quantum processors with hopping spins. Chien-An Wang, Valentin John, Hanifa Tidjani, Cécile X. Yu, Alexander Ivlev. Show All(19) Feb 28, 2024. 18 pages. ... This may be accomplished with single-spin semiconductor qubits, if one can engineer hopping spins between quantum dots with site-dependent spin quantization axis ...
  10. ar5iv.labs.arxiv.org

    Mar 5, 2024Figure 3: Hopping spins to benchmark large and high-connectivity quantum dot architectures. a, Our vision of a semiconductor quantum computing architecture comprising hopping Loss-DiVincenzo (LD) spin qubits (black arrows), readout units (eyes), and empty quantum dot sites for shuttling operations. b, Layout of the 10 quantum dot array, with gate-defined charge sensors labelled in analogy of ...
  11. preprints.kavlimeetings.org

    Feb 28, 2024quantum control based on discrete signals could therefore result in a paradigm shift. This may be accomplished with single-spin semiconductor qubits, if one can engineer hopping spins between quantum dots with site-dependent spin quantization axis. Here, we introduce hopping-based universal quantum logic and
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