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Reference : UMR8247-PHIGOL-004
Workplace : PARIS 05
Date of publication : Tuesday, June 8, 2021
Scientific Responsible name : Philippe Goldner (IRCP) et Jocelyn Achard (LSPM)
Type of Contract : PhD Student contract / Thesis offer
Contract Period : 36 months
Start date of the thesis : 1 October 2021
Proportion of work : Full time
Remuneration : 2 135,00 € gross monthly
Description of the thesis topic
Quantum technologies aim to develop new features that are impossible to obtain in conventional systems, for communications, data processing or sensors. This area, currently in full swing, is identified as strategic at European and national levels. However, the materials foreseen for these new technologies must show exceptional properties, in particular allowing to create long lived quantum states, which represents a significant challenge. In addition, the ability to combine, or interact with, multiple quantum systems is also sought. In particular, light is an excellent vector of quantum information, while spins are systems of choice to preserve it.
Among the materials able to interact with light, color centers in diamond and crystals doped by rare earth (RE) ions are particularly promising. They are intensively studied and have enabled significant advances in magnetometry, quantum memories or quantum computing. While many efforts are focused on the separate optimization of these materials, this project aims to explore new features in these areas through hybrid diamond/rare earth structures. Indeed, these two components are particularly effective in distinct fields: the nitrogen-vacancy center (NV-) in diamond has an electronic spin whose quantum states have long lifetimes, even at room temperature; RE ions present optical transitions that can constitute quantum interfaces with light in a wide spectral range from infrared to UV. A hybrid structure could combine these remarkable properties at the quantum level, which no system presents simultaneously to date. This PhD project aims at achieving this ambitious goal. It will take place in the framework of a collaboration between two teams: the IRCP (Institut de Recherche de Chimie Paris) group specializes in the development of materials doped by RE ions for quantum technologies; the LSPM (Laboratoire des Sciences des Procédés et des Matériaux) team is one of the main groups allowing the synthesis of quantum-grade diamonds based on NV center in Europe.
The project will have three main parts:
1. synthesis of hybrid rare earth diamond materials and structural characterization.
2. detailed assessment of optical and spin spectroscopic properties for NV- and RE centers and optimization of hybrid structures.
3. demonstration of RE-NV- coupling under different excitation and detection schemes.
This project will take place at the IRCP (Institut de Recherche de Chimie Paris) and the LSPM (Laboratoire des Sciences des Procédés et des Matériaux).
The group "Crystals and dynamics of quantum states" (www.cqsd.fr) of the IRCP (Chimie ParisTech / CNRS / PSL University) is internationally recognized for the development of rare earth doped crystals for applications to quantum technologies. It is located in Paris, 5th arrondissement, at Chimie ParisTech. IRCP is a chemistry institute covering all areas of chemistry research.
The LSPM group (CNRS/Université Sorbonne Paris Nord) is located in Villetaneuse and has a great expertise in diamond synthesis for quantum technologies.
This position is part of a project funded by the CNRS Mathyq (Hybrid Materials for Optical Quantum Technologies).
Constraints and risks
Use of lasers and cryogenic fluids
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