%0 Electronic Article
%A Ciroth, Nils
%A Sala, Arnau
%A Xue, Ran
%A Ermoneit, Lasse
%A Koprucki, Thomas
%A Kantner, Markus
%A Schreiber, Lars R.
%T Numerical simulation of coherent spin-shuttling in a QuBus with charged defects
%I arXiv
%M FZJ-2025-05804
%D 2025
%X Recent advances in coherent conveyor-mode spin qubit shuttling are paving the way for large-scale quantum computing platforms with qubit connectivity achieved by spin qubit shuttles. We developed a simulation tool to investigate numerically the impact of device imperfections on the spin-coherence of conveyor-mode shuttling in Si/SiGe. We simulate the quantum evolution of a mobile electron spin-qubit under the influence of sparse and singly charged point defects placed in the Si/SiGe heterostructure in close proximity to the shuttle lane. We consider different locations of a single charge defect with respect to the center of the shuttle lane, multiple orbital states of the electron in the shuttle with $g$-factor differences between the orbital levels, and orbital relaxation induced by electron-phonon interaction. With this simulation framework, we identify the critical defect density of charged point defects in the heterostructure for conveyor-mode spin qubit shuttle devices and quantify the impact of a single defect on the coherence of a qubit.
%K Mesoscale and Nanoscale Physics (cond-mat.mes-hall) (Other)
%K Quantum Physics (quant-ph) (Other)
%K FOS: Physical sciences (Other)
%F PUB:(DE-HGF)25
%9 Preprint
%R 10.48550/ARXIV.2512.03588
%U https://juser.fz-juelich.de/record/1050096