NQCP - Talk Vincent Michal - University of Oxford

Interconnecting spins in semiconductors: strong interaction between hole spins and microwave photons

The large spin-orbit interaction of holes in semiconductors is key to achieve strong spin-photon coupling in spin circuit-QED experiments ([1] and references therein). I will present theoretical predictions pointing out that for a single hole in silicon this coupling is “reciprocally sweet”, meaning that it can be tuned from fully transverse (allowing coherent spin rotations) to fully longitudinal (modulating the spin resonance frequency) [2, 3]. Based on the longitudinal coupling, I will then highlight how distant spin-spin coherent coupling and parametrically driven spin-readout can be achieved in experiments. In addition at the end of the presentation I will talk about our current efforts towards controlling imperfect solid state quantum devices by associating machine learning to physical models.

References:

[1] C. X. Yu, S. Zihlmann, J. C. Abadillo-Uriel, V. P. Michal, N. Rambal, H. Niebojewski, T. Bedecarrats, M. Vinet, É. Dumur, M. Filippone, B. Bertrand, S. De Franceschi, Y.-M. Niquet, and R. Maurand, Strong coupling between a photon and a hole spin in silicon, Nature Nanotechnology (2023).
[2] V. P. Michal, J. C. Abadillo-Uriel, S. Zihlmann, R. Maurand, Y.-M. Niquet, and M. Filippone, Tunable hole spin-photon interaction based on g-matrix modulation, Phys. Rev. B 107, L041303 Editors' Suggestion (2023).
[3] N. Piot, B. Brun, V. Schmitt, S. Zihlmann, V. P. Michal, A. Apra, J. C. Abadillo-Uriel, X. Jehl, B. Bertrand, H. Niebojewski, L. Hutin, M. Vinet, M. Urdampilleta, T. Meunier, Y.-M. Niquet, R. Maurand & S. De Franceschi, A single hole spin with enhanced coherence in natural silicon, Nature Nanotechnology, 1072 (2022).