HEИндивидуална стипендия2023–2025

Q-FLIGHTS · Quantum Fluids-of-Light Turbulence in Semiconductor microcavities

„Хоризонт Европа“ — Действия „Мария Склодовска-Кюри“

Период: 2023-07-01 → 2025-06-30
Финансиране от ЕС: 195 915 €
Участници: 1
Схема: HORIZON-TMA-MSCA-PF-EF

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Накратко на български

Квантовите флуиди от светлина в полупроводникови микрокувити се изследват чрез наблюдение на вихри, подобни на тези в течния хелий. Това помага да се разбере как се появява турбулентността в системи, които са извън равновесие.

Този кратък обзор е генериран от изкуствен интелект

Кратко обяснение, генерирано от езиков модел по текста на CORDIS. Оригиналът е по-долу.

Резултати накратко

Quantum Fluids-of-Light Turbulence in Semiconductor microcavities

The Q-FLIGHTS project explored a special kind of quantum fluid made of light, called an exciton-polariton fluid, which forms in semiconductor microcavities under laser excitation. These fluids exhibit remarkable properties like superfluidity and the formation of quantized vortices, similar to those observed in liquid helium or ultracold atomic gases. Unlike traditional fluids, polariton fluids are driven by lasers and constantly dissipate energy, making them fundamentally out of equilibrium. This opens the door to observing unique physical phenomena, including quantum turbulence, a highly complex state where many vortices form, move, and interact in unpredictable ways. The main objective of Q-FLIGHTS was to study how turbulence emerges in such fluids, and how it differs from classical turbulence (like air or water flow). To achieve this, the project developed a novel experimental platform capable of capturing “snapshots” of these light fluids in real time, with high spatial and temporal resolution. Alongside this, the project established theoretical models to describe the conditions under which the fluid behaves regularly, forms solitons, becomes turbulent, or regains coherence as a superfluid. Q-FLIGHTS aimed to: -Reveal the statistical nature of vortex nucleation in 2D polariton fluids. -Develop ultrafast detection methods based on nonlinear optics. -Simulate and classify the various dynamical regimes of these fluids.

Текст от CORDIS, на английски · Данни: CORDIS, © Европейски съюз

Цел на проекта

Quantum fluids are an extraordinary category of physical systems where quantum nature reveal itself at a macroscopic level. Superconductivity, superfluidity and Bose-Einstein condensation are spectacular examples of macroscopic coherence effects in quantum fluids. Driven out-of-equilibrium, both classical and quantum fluids display turbulent behaviors. The main difference between the two is lying in the fact that quantum fluids possess an absence of viscosity, and the building blocks of turbulence phenomena, the elementary excitations named vortices, have to be quantized meaning that the phase circulation around their core has to be a multiple of 2pi. These two properties affect drastically the system's behaviors compared to the classical turbulent scenario where vortices are known to interact all together in a continuous manner and have the potential to redistribute the energy of the system at all scales. These brought the questions of how vortices are nucleating, interacting, and recombining in the quantum fluid opening the field of quantum turbulence. How the primordial fluctuations associated with the quantum nature of the system can influence the aforementioned vortex properties? Is their spreading of entanglement mediated by interactions in a turbulent superfluid leading to squeezing states? Having insights into the previous questions would allow to understand what is the main implication of the difference between quantum turbulence and classical turbulence.In this action, we propose to investigate these questions with a superfluid of light made of semiconductor microcavities. This system allows to realize full microscopic investigation of 2D vortex spatial distributions to unveil their statistics and their interacting/nucleating properties. Furthermore, by elaborating a new time sampling nonlinear detection we will evaluate spatiotemporal correlations spreading in the system with the potential to enter the deep quantum regime of quantum fluids.

Оригинален текст от CORDIS (на английски).

Участници

CENTRE NATIONAL DE LA RECHERCHE SCIENTIFIQUE CNRS · ParisКоординаторФранция