Low power electric dipole spin resonance in silicon: experiment*

Spin-based quantum information processing requires exquisite single spin control. While electron spin resonance is a natural means of controlling spin qubits in gate-defined quantum dots, generating localized ac magnetic fields large enough to drive coherent oscillations is challenging. As an alternative, electric dipole spin resonance (EDSR) can be employed [1]. Spin-orbit coupling often mediates EDSR: however, intrinsic spin-orbit coupling in silicon is small. To overcome this, on-chip micromagnets can be used to generate synthetic spin-orbit interactions [2], with EDSR having now been demonstrated in silicon [3, 4]. Here we present experimental results using a new technique for low-power EDSR in silicon with micromagnets, in a step towards scalable power budgets for large-scale spin-based quantum processors.

[1] E. I. Rashba, Sov. Phys. Solid State 2, 1109 (1960)
[2] M. Pioro-Ladriere et al., Nat. Phys. 4, 776 (2008)
[3] E. Kawakami et al., Nat. Nanotech. 9, 666 (2014)
[4] J. Yoneda et al., Nat. Nanotech. 13, 102 (2018)