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Coherent spin qubit shuttling through germanium quantum dots.
van Riggelen-Doelman, Floor; Wang, Chien-An; de Snoo, Sander L; Lawrie, William I L; Hendrickx, Nico W; Rimbach-Russ, Maximilian; Sammak, Amir; Scappucci, Giordano; Déprez, Corentin; Veldhorst, Menno.
Afiliação
  • van Riggelen-Doelman F; QuTech and Kavli Institute of Nanoscience, Delft University of Technology, PO Box 5046, 2600 GA, Delft, The Netherlands.
  • Wang CA; QuTech and Kavli Institute of Nanoscience, Delft University of Technology, PO Box 5046, 2600 GA, Delft, The Netherlands.
  • de Snoo SL; QuTech and Kavli Institute of Nanoscience, Delft University of Technology, PO Box 5046, 2600 GA, Delft, The Netherlands.
  • Lawrie WIL; QuTech and Kavli Institute of Nanoscience, Delft University of Technology, PO Box 5046, 2600 GA, Delft, The Netherlands.
  • Hendrickx NW; QuTech and Kavli Institute of Nanoscience, Delft University of Technology, PO Box 5046, 2600 GA, Delft, The Netherlands.
  • Rimbach-Russ M; QuTech and Kavli Institute of Nanoscience, Delft University of Technology, PO Box 5046, 2600 GA, Delft, The Netherlands.
  • Sammak A; QuTech and Netherlands Organisation for Applied Scientific Research (TNO), 2628 CK, Delft, The Netherlands.
  • Scappucci G; QuTech and Kavli Institute of Nanoscience, Delft University of Technology, PO Box 5046, 2600 GA, Delft, The Netherlands.
  • Déprez C; QuTech and Kavli Institute of Nanoscience, Delft University of Technology, PO Box 5046, 2600 GA, Delft, The Netherlands. c.c.deprez@tudelft.nl.
  • Veldhorst M; QuTech and Kavli Institute of Nanoscience, Delft University of Technology, PO Box 5046, 2600 GA, Delft, The Netherlands. m.veldhorst@tudelft.nl.
Nat Commun ; 15(1): 5716, 2024 Jul 08.
Article em En | MEDLINE | ID: mdl-38977681
ABSTRACT
Quantum links can interconnect qubit registers and are therefore essential in networked quantum computing. Semiconductor quantum dot qubits have seen significant progress in the high-fidelity operation of small qubit registers but establishing a compelling quantum link remains a challenge. Here, we show that a spin qubit can be shuttled through multiple quantum dots while preserving its quantum information. Remarkably, we achieve these results using hole spin qubits in germanium, despite the presence of strong spin-orbit interaction. In a minimal quantum dot chain, we accomplish the shuttling of spin basis states over effective lengths beyond 300 microns and demonstrate the coherent shuttling of superposition states over effective lengths corresponding to 9 microns, which we can extend to 49 microns by incorporating dynamical decoupling. These findings indicate qubit shuttling as an effective approach to route qubits within registers and to establish quantum links between registers.

Texto completo: 1 Base de dados: MEDLINE Idioma: En Ano de publicação: 2024 Tipo de documento: Article

Texto completo: 1 Base de dados: MEDLINE Idioma: En Ano de publicação: 2024 Tipo de documento: Article