Stochastic turbulence and Superfluidity in quantum fluid of light (M/F)
New
- FTC PhD student / Offer for thesis
- 36 mounth
- Doctorate
This offer is available in English version
This offer is open to people with a document recognizing their status as a disabled worker.
Offer at a glance
The Unit
Physique des lasers, atomes et molécules
Contract Type
FTC PhD student / Offer for thesis
Working hHours
Full Time
Workplace
59655 VILLENEUVE D ASCQ
Contract Duration
36 mounth
Date of Hire
01/10/2026
Remuneration
2300 € gross monthly
Apply Application Deadline : 17 April 2026 23:59
Job Description
Thesis Subject
The first part of this PhD project addresses a fundamental question: how does two-dimensional turbulence emerge as a function of disorder in a quantum fluid of light? Using optical excitations to impose both a controlled spatial periodicity and tunable disorder landscapes, our experimental system can be driven across regimes ranging from linear-wave dynamics to solitonic states and fully developed turbulence. By systematically varying an externally imposed disorder (amplitude and correlation properties), we will explore how spatial inhomogeneities initiate, shape, or suppress the onset of turbulent behavior and vortex proliferation. Ultrafast single-shot DFG imaging will provide direct access to vortex distributions and spatial correlations across these regimes.
The second part of the project investigates whether forces can emerge in a quantum fluid of light, a question that remains non-trivial given the absence of viscosity in superfluids. To address this, we propose to study how a polariton superfluid interacts with a controlled repulsive potential, and whether such an encounter can lead to measurable momentum transfer. In particular, we will explore the possibility that turbulence and vortex nucleation provide the microscopic mechanism through which effective quantized forces of finite range appear. By monitoring the transition from frictionless flow to turbulence-induced momentum exchange, this work aims to clarify the physical origin of forces in driven-dissipative quantum superfluids.
Group Website : https://photonlattices.eu/
Your Work Environment
This thesis project will be performed in an international dynamic group composed of two CNRS researchers and a few Ph.D. students and master's students.
The laboratory is fully equipped with various equipment (lasers, detectors, control systems) to fulfill the thesis plan.
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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
| Offer reference | UMR8523-CLEHAI-001 |
|---|---|
| CN Section(s) / Research Area | Atoms and molecules, optics and lasers, hot plasmas |
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.
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