PhD On The Modelling Of Silicon And Germanium Spin Qubits

A completely funded PhD position is open at CEA Grenoble on the modelling of silicon and germanium spin qubits (starting date: September/October 2023).

Silicon and Germanium spin qubits have made excellent progress in the past two years [1, 2]. In these gadgets, the elementary data is saved as a coherent superposition of the spin states of an electron or hole in a Si/SiO$_2$ or SiGe heterostructure. These spins might be manipulated electrically owing to spin-orbit coupling, and are entangled through alternate interactions, permitting for a selection of 1- and two-qubit gates required for quantum computing and simulation. Grenoble, one of many leading scientific cities in France, is promoting unique spin qubit platforms primarily based on Si and Ge, and holds various data in spin lifetimes [3] and spin-photon interactions [4].

At CEA/IRIG, we help the progress of these quantum technologies with state-of-the-art modelling [3, four]. Particularly, we’re creating the TB_Sim code, in a position to explain very sensible qubit structures down to the atomic scale if wanted. The purpose of this PhD is to mannequin the quantum dynamics of single and coupled Si/Ge spin qubits in relation with ongoing experiments, utilizing a mix of analytical and numerical (TB_Sim) methods. The project will deal with spin manipulation and entanglement in arrays of spin qubits, the response to noise and disorder (decoherence), and the interactions with photons (circuit quantum electrodynamics). The PhD candidate can have the opportunity to work together with a lively community of experimentalists working on spin qubits at CEA and CNRS. This PhD is anticipated to start out in September/October 2023 and is totally funded by a grant from the french ANR.

To apply, ship a CV to yniquet@cea.fr.

References:

[1] A four-qubit preis germanium quantum processor, N. W. Hendrickx et al., Nature 591, 580 (2021).

[2] Common control of a six-qubit quantum processor in silicon, S. G. J. Philips et al., Nature 609, 919 (2022).

[3] A single hole spin with enhanced coherence in pure silicon, N. Piot, …, Y.M. Niquet et al., Nature Nano 17, 1072 (2022).

[4] Robust coupling between a photon and a gap spin in silicon, C. X. Yu, …, Y.M. Niquet et al., Nature Nano (2023) [arXiv:2206.14082].