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COUPE SIGNED

COUPE - COUPling Excitations

Total Cost €

0

EC-Contrib. €

0

Partnership

0

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 COUPE project word cloud

Explore the words cloud of the COUPE project. It provides you a very rough idea of what is the project "COUPE" about.

simulation    series    description    precise    radiation    coupled    structures    excitations    kinds    spectroscopic    resolution    exist    latter    exciton    consist    quasi    secondary    gw    condensed    whereas    phonon    perturbation    soleil    spectra    interactions    quasiparticle    time    synchrotron    functional    paris    gas    transitions    discoveries    dependent    connector    couple    magnetic    peaks    few    confirm    electron    pure    striking    coupling    inhomogeneous    materials    followed    cumulant    coupe    model    excitation    dominant    material    led    proposes    ubiquitous    interaction    linked    ct    describes    superconducting    severe    bosonic    signatures    interpretation    previously    body    systematic    inaccessible    bosons    density    pertinent    tddft    expansion    modern    sources    characterization    particle    interpreted    science    couples    plasmon    preliminary    limitations    improvement    relies    signature    first    satellites    homogeneous    describe    approximation    theory    spin    resort    combination    boson    envisaged    quasiparticles    fact   

Project "COUPE" data sheet

The following table provides information about the project.

Coordinator
ECOLE POLYTECHNIQUE 

Organization address
address: ROUTE DE SACLAY
city: PALAISEAU CEDEX
postcode: 91128
website: http://www.polytechnique.fr

contact info
title: n.a.
name: n.a.
surname: n.a.
function: n.a.
email: n.a.
telephone: n.a.
fax: n.a.

 Coordinator Country France [FR]
 Total cost 184˙707 €
 EC max contribution 184˙707 € (100%)
 Programme 1. H2020-EU.1.3.2. (Nurturing excellence by means of cross-border and cross-sector mobility)
 Code Call H2020-MSCA-IF-2019
 Funding Scheme MSCA-IF-EF-ST
 Starting year 2020
 Duration (year-month-day) from 2020-05-01   to  2022-04-30

 Partnership

Take a look of project's partnership.

# participants  country  role  EC contrib. [€] 
1    ECOLE POLYTECHNIQUE FR (PALAISEAU CEDEX) coordinator 184˙707.00

Map

 Project objective

Spectroscopic characterization of matter is ubiquitous in modern material science. Increased resolution and precise control over radiation sources have led to numerous discoveries of previously inaccessible spectroscopic signatures, often linked to complex excitation processes. The main challenge in their interpretation is the fact that excitations are coupled through interactions. A striking signature for this is that spectra often consist of one or more dominant peaks (called quasi-particle), followed by a series of secondary structures (called satellites). The latter, which can be very strong, are pure interaction effects and may be interpreted in terms of coupling of a quasiparticle to a bosonic excitation of the material: a plasmon, exciton, phonon, or any other boson. To solve the electron-boson problem, and, first of all, to set up the description in terms of the most pertinent quasiparticles and bosons, is a major challenge of condensed matter theory. COUPE will face this challenge. Today, quasiparticles are most often described in the GW approximation to many-body perturbation theory, whereas for bosonic excitations one can resort to time-dependent density-functional theory (TDDFT). Only a few approaches exist to describe the coupled problem, with severe limitations. For example, a cumulant expansion on top of GW describes plasmon satellites, but cannot couple to spin excitations, and there is yet no systematic way for improvement. COUPE proposes a new combination of GW and TDDFT which couples quasiparticles to all kinds of bosonic excitations. This combination relies on a recently developed “connector theory” (CT), which allows using results from the homogeneous electron gas to describe inhomogeneous materials. COUPE will further apply it to the simulation of phase transitions in magnetic and superconducting materials under study at the synchrotron SOLEIL in Paris. Preliminary model results confirm the great potential of the approach envisaged in COUPE.

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The information about "COUPE" are provided by the European Opendata Portal: CORDIS opendata.

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