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

Controlling and interconnecting coherent quantum systems (such as quantum bits or qubits) in the solid state is a considerable challenge in modern scientific research. Notably, the spin of electrons and holes confined in semiconductor quantum dots present very rich physics and are also attractive because of their potential dense integration in semiconductor devices [1]. In particular, the large spin-orbit interaction of holes in semiconductors is key to achieve strong spin-photon coupling in spin circuit-QED experiments ([2] 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) [3, 4]. 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. Then, near the end of the presentation I will give an overview of our current efforts in developping effective simulations to improve the characterization and control of the spin qubits.

References:

[1] L. M. K. Vandersypen, H. Bluhm, J. S. Clarke, A. S. Dzurak, R. Ishihara, A. Morello, D. J. Reilly, L. R. Schreiber, and M. Veldhorst, Interfacing spin qubits in quantum dots and donors — hot,
dense, and coherent, npj Quantum Information 34 (2017).

[2] 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).

[3] 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).

[4] 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, and S. De Franceschi, A single hole spin with enhanced coherence in natural silicon, Nature Nanotechnology, 1072 (2022).