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EXAFIELD

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Experimental signatures of quantum electrodynamics in the strong field regime

Quantum Electrodynamics (QED) is the theory that unifies electromagnetism and quantum mechanics to describe how light and matter interact. Considered as one of the most accurately tested theories, it led Richard Feynman to call it... ver más

30/09/2028

CNRS

2M€

Presupuesto del proyecto: 2M€

Líder del proyecto

CENTRE NATIONAL DE LA RECHERCHE SCIENTIFIQUE... No se ha especificado una descripción o un objeto social para esta compañía.

TRL 4-5

Fecha límite participación Sin fecha límite de participación.

Financiación concedida El organismo HORIZON EUROPE notifico la concesión del proyecto el día 2023-10-01

ERC-2022-STG: ERC STARTING GRANTS Scope:Objectives

I+D

Cerrada hace 3 años

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Duración del proyecto: 59 meses Fecha Inicio: 2023-10-01
Fecha Fin: 2028-09-30

Líder del proyecto

CENTRE NATIONAL DE LA RECHERCHE SCIENTIFIQUE... No se ha especificado una descripción o un objeto social para esta compañía.

TRL 4-5

Presupuesto del proyecto 2M€

Fecha límite de participación Sin fecha límite de participación.

Descripción del proyecto Quantum Electrodynamics (QED) is the theory that unifies electromagnetism and quantum mechanics to describe how light and matter interact. Considered as one of the most accurately tested theories, it led Richard Feynman to call it “the jewel of physics”. Yet, in the strong-field (SF) regime, when the light fields are ultra-intense, this theory is only treated perturbatively and the non-perturbative regime of SF-QED remains a terra incognita as even no theory exists to predict the behaviour of nature. The advent of multi-PW laser infrastructures now makes the SF-QED regime within experimental reach when considering the collision of relativistic electrons with such light pulses focused above 10^22W/cm2. Yet, all planned experiments to probe SF-QED with current technologies only propose to investigate its perturbative regime, expected to be well described by theory.In the EXAFIELD project, I propose a new concept of experiments to exceed the perturbative limit of SF-QED in the lab. This will be achieved by reflecting an ultra-intense laser pulse off a plasma mirror at relativistic speed. The strong Doppler effect occurring upon reflection up-converts the near-infrared laser pulse down to the extreme ultraviolet range which enables both temporal compression to the attosecond timescale and spatial compression down to sub-micron size. This results in a considerable intensity boost at focus of more than three orders of magnitude up to a few-10^25W/cm2.The collision of such a “Doppler-boosted beam” with ultrashort electron bunches generated from laser-plasma accelerators will allow us to access regimes where the SF-QED can no longer be treated perturbatively, producing very strong signatures in the lab. Characterizing how the observations deviate from the perturbative theory will enable us to determine the limits of validity of the perturbative models and will open to a new area of research toward the understanding of the non-perturbative regime of SF-QED.

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