Bulletin of the American Physical Society
APS March Meeting 2023
Volume 68, Number 3
Las Vegas, Nevada (March 5-10)
Virtual (March 20-22); Time Zone: Pacific Time
Session EE03: V: Semiconductor Qubits
10:00 AM–11:24 AM,
Monday, March 20, 2023
Room: Virtual Room 3
Sponsoring
Unit:
DQI
Chair: Biswajit Datta, City university of New York
Abstract: EE03.00007 : Theory of coherent electron shuttling using pre-defined and moving quantum dots in Si*
11:12 AM–11:24 AM
Presenter:
Jan A Krzywda
(Institute of Physics Polish Academy of Sciences)
Authors:
Jan A Krzywda
(Institute of Physics Polish Academy of Sciences)
Lukasz Cywinski
(Institute of Physics Polish Academy of Sciences)
In contrast in CB mode, 4-terminal gates are proven to generate stable and deep moving potential, even in presence of typical electrostatic disorder [4,5]. With high-fidelity charge transfer, we have analyzed the spin dynamics and predicted 99.9% fidelity of coherent transfer over 10μm at ≈10 m/s electron velocity. The remaining error is attributed to spin dephasing, which is activated by: valley excitations on atomistic disorder and spatially dependent fluctuations of spin splitting from nuclear spins or charge noise.
[1] J.M. Boter et al., Phys. Rev. App. 18, 024053 (2022)
[2] J.A.K, L. Cywinski, Phys. Rev. B 101, 035303 (2020)
[3] J.A.K, L. Cywinski, Phys. Rev. B 104, 075439 (2021)
[4] I. Seidler et al., npj Quantum Information 8, 100 (2021)
[5] V. Langrock, J.A.K et al., arXiv:2202.11793
*This his work has been funded by the National Science Centre (NCN), Poland under QuantERA program, Grant No. 2017/25/Z/ST3/03044. J.A.K. additionally ackonwladge initial funding from ETIUDA doctoral scholarship, Grant No. 2020/36/T/ST3/00569 and funding from PRELUDIUM grant, Grant No. 2021/41/N/ST3/02758
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