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Scalable digital architecture for Qubits control in Quantum computer

Département Architectures Conception et Logiciels Embarqués (LIST-LETI)

Laboratoire Intégration Silicium des Architectures Numériques



Scaling Quantum Processing Units (QPU) to hundreds of Qubits leads to profound changes in the Qubits matrix control: this control will be split between its cryogenic part and its room temperature counterpart outside the cryostat. Multiple constraints coming from the cryostat (thermal or mechanical constraints for example) or coming from Qubits properties (number of Qubits, topology, fidelity, etc?) can affect architectural choices. Examples of these choices include Qubits control (digital/analog), instruction set, measurement storage, operation parallelism or communication between the different accelerator parts for example. This postdoctoral research will focused on defining a mid- (100 to 1,000 Qubits) and long-term (more than 10,000 Qubits) architecture of Qubits control at room temperature by starting from existing QPU middlewares (IBM QISKIT for example) and by taking into account specific constraints of the QPU developed at CEA-Leti using solid-state Qubits.

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Optical sensor development for in-situ and operando Li-ion battery monitoring

Département de l'Electricité et de l'Hydrogène pour les Transports (LITEN)

Laboratoire Analyse électrochimique et Post mortem



To improve the battery management system, it is required to have a better knowledge of the physical and chemical phenomena inside the cells. The next generation of cells will integrate sensors for deepest monitoring of the cell to improve the performances, safety, reliability and lifetime of the battery packs. The main challenge is thus to measure relevant physico-chemical parameters in the heart of the cell to get a direct access to the real state of the cell and thus to optimize its management. To address this challenge, a research project will start at CEA at the beginning of 2020 to develop innovative optical sensors for Li-ion battery monitoring. He / She will participate, in a first step, to the development of optical probes and their integration on optical fibres. The work will focus on the synthesis of a photo-chemical probe (nanoparticle and/or molecule) as active part of the sensor. Then, theses probes will be put on the optical fibre surface to form the sensor. The candidate will also participate to the realization of an optical bench dedicated to the testing of the sensors. In a second step, he / she will work on integrating the sensors into the Li-ion cells and test them in different conditions. The objective is to demonstrate the proof of concept: validation of the sensors efficiency to capture the behaviour of the cell and correlate it to electrochemical measurements.

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Integration and packaging of microelectrodes

Clinatec (LETI)

Clinatec (LETI)



As part of a project funded by the National Research Agency, CEA (Clinatec and DTBS) in collaboration with CNRS-CERMAV ( are developing ultra-flexible and bio-resorbable electrode arrays based on biopolymers. These arrays will be used (after implantation) for approximately 4 weeks then must be resorbed in vivo while remaining biocompatible. The final phase of the project consists of a preclinical in-vivo evaluation. This work follows several developments related to the chemical synthesis of original biocompatible substrates and inks made in collaboration with CERMAV. The post-doc objective is the structuration of these layers and assembling them to create the intended microarrays of electrodes for in vivo recording or stimulation. The arrays thus created will be subjected to mechanical, aging and biodegradation tests. After these ?in-vitro? validations, the last phase of the project will consist of preclinical assessments on rodents. In this mission within CEA teams, you will contribute to the development of integration techniques and tests for the successful completion of the microelectrode arrays. You will also be in charge of in-vitro test campaigns. Finally, assisted by the Clinatec preclinical team, you will contribute to the preparation of preclinical trials and monitor their execution

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