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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.

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

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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