Multi-scale modeling of the electromagnetic quantum dot environment

Published : 12 March 2020

Multi-scale modeling of the electromagnetic quantum dot environment

In the near future, emerging quantum information technologies are expected to lead to breakthroughs in the world of high performance computing and secure communication. Among solid-state approaches, “Silicon on Insulator” (SOI) based spin quantum bit (qubit) is an alternative approach to nowadays superconducting based one [1]. They are much more compact and have demonstrated over the last few years significant achievements, with long coherence time and fast single qubit rotation.

A clear challenge is now to investigate the scalability issues going from single to multiple of the spin qubits in SOI, taking into account its associated classical CMOS platform used for control, read-out and initialization of the quantum state [2]. The main goal of this PhD work is to assess different strategies to implement spin control on 2D qubit arrays using microwaves signals.

The candidate will i) characterize radio-frequency (RF) test structures at very low temperature using state-of-the-art equipment and compare results with dedicated electromagnetic simulations, ii) develop a toolbox to allow multi-scale optimization from single to qubit arrays, iii) integrate RF spin microwave control for 2D qubit array using CEA-LETI silicon technologies.

This PhD work will be performed in the frame of a tripartite collaborative project between CEA-LETI, CEA-IRIG and CNRS-Institut Néel (ERC “Qucube”).

[1] Maurand, R. et al. A CMOS silicon spin qubit, Nat. Communications 7, 13575 (2016).

[2] Meunier, T. et al. Towards scalable quantum computing based on silicon spin, Symp. on VLSI Technology, 2019.

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