Control of dephasing in spin qubits during coherent transport in silicon
Abstract
One of the key pathways towards scalability of spin-based quantum computing systems lies in achieving long-range interactions between electrons and increasing their inter-connectivity. Coherent spin transport is one of the most promising strategies to achieve this architectural advantage. Experimental results have previously demonstrated high fidelity transportation of spin qubits between two quantum dots in silicon and identified possible sources of error. In this theoretical study, we investigate these errors and analyze the impact of tunnel coupling, magnetic field and spin-orbit effects on the spin transfer process. The interplay between these effects gives rise to double dot configurations that include regimes of enhanced decoherence that should be avoided for quantum information processing. These conclusions permit us to extrapolate previous experimental conclusions and rationalize the future design of large scale quantum processors.
Keywords
Cite
@article{arxiv.2207.11865,
title = {Control of dephasing in spin qubits during coherent transport in silicon},
author = {MengKe Feng and Jun Yoneda and Wister Huang and Yue Su and Tuomo Tanttu and Chih Hwan Yang and Jesus D. Cifuentes and Kok Wai Chan and William Gilbert and Ross C. C. Leon and Fay E. Hudson and Kohei M. Itoh and Arne Laucht and Andrew S. Dzurak and Andre Saraiva},
journal= {arXiv preprint arXiv:2207.11865},
year = {2024}
}
Comments
18 pages, 9 figures