Thesis in Multipartite Quantum Optics (M/F)

Job Description

Thesis Subject

Photonic quantum information exploits quantum properties of light to achieve communication and computational tasks that are classically unfeasible. In this context, quantum entanglement between frequency (temporal) modes is a key resource as it enable achieving record numbers of quantum information carriers, linked together in highly correlated quantum state. In addition, depending on the situation, individual frequency modes can be separated thanks to standard demultiplexing techniques. In measurement-based quantum computing, multipartite entanglement allows quantum computation to proceed solely through local measurements on individual modes. At the same time, practical applications demand entanglement whose structure can vary depending on the specific quantum task. Such condition implies mastering the generation of quantum correlations as well as developing manipulation and measurement techniques in the desired degrees of freedom. The proposed work investigates the controlled generation and manipulation of multimode entanglement in continuous variable regime. Entangled modes will be produced in non-linear waveguides: such a configuration marries the advantage of a high-dimensional quantum alphabet with that of cutting down the physical size of optical systems, both crucial conditions for realistic quantum applications. The multimode features of produced states are determined by acting on the working conditions of the SPDC process, by suitable shaping the SPCD optical pump frequency and temporal profile. Multipartite entangled state will then be employed in protocol aiming at the “non-Gaussian” manipulation of states and enabling key resources and techniques for quantum advantage in photonic quantum computing. Engineered multipartite entanglement will be measured via homodyne detection techniques.
The candidate will work to the design and the experimental implementation of the setup for the entanglement generation, tailoring and detection as well as to the data acquisition and interpretation of results, validating the quality of Gaussian and Non-Gaussian states obtained when engineering the source.

Your Work Environment

The successful candidate will join the Photonics and Quantum Information group at INPHYNI (Université Côte d'Azur, Nice). Their research will also benefit from a close collaboration with the Multimode Quantum Optics group at the Laboratoire Kastler Brossel (Paris), where they are expected to spend part of their PhD.
This research is conducted within the broader framework of the OQULUS project, providing a highly stimulating scientific environment. Regular interactions between the experimental and theoretical partners of the project will play a key role in the modeling, verification, and validation of multipartite quantum information protocols. These exchanges will contribute to optimizing their implementation in photonic resource-based quantum computing architectures.

Constraints and risks

Short-term travel in France and internationally may be required.
The position involves experimental work with laser systems. Appropriate personal protective equipment will be provided to the successful candidate, and all optical laboratories are equipped with laser safety signage and protection systems in compliance with applicable safety standards

Compensation and benefits

Compensation

2300 € gross monthly

Annual leave and RTT

44 jours

Remote Working practice and compensation

Pratique et indemnisation du TT

Transport

Prise en charge à 75% du coût et forfait mobilité durable jusqu’à 300€

About the offer

About the CNRS

The CNRS is a major player in fundamental research on a global scale. The CNRS is the only French organization active in all scientific fields. Its unique position as a multi-specialist allows it to bring together different disciplines to address the most important challenges of the contemporary world, in connection with the actors of change.

CNRS

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