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Angulon: physics and applications of a new quasiparticle

Total Cost €


EC-Contrib. €






 ANGULON project word cloud

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

experiments    solvents    dynamics    commuting    solvent    reaching    levels    shown    force    ultracold    de    insights    theory    momentum    effect    promise    gain    lattice    atoms    particles    impossible    demonstrated    rotation    environment    discovered    analytical    angular    gas    deals    rotating    universal    rotations    quasiparticle    body    behavior    ranging    quantum    ultrafast    solids    reactions    reactivity    extremely    coupled    physics    haas    equilibrium    molecules    techniques    holds    magnetism    pi    operators    chemical    opening    interdisciplinary    transfer    nuclear    2017    inevitably    perturbed    superfluids    ubiquitous    electronic    area    atomic    variety    fashion    angulons    einstein    depends    inaccessible    interacting    altered    team    surrounding    collisions    experimentally    met    macroscopic    few    excited    introducing    microscopic    approached    consisting    molecular    solid    condensed    angulon    brute    existence    world    galaxies    phonons   

Project "ANGULON" data sheet

The following table provides information about the project.


Organization address
address: Am Campus 1
postcode: 3400

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 Austria [AT]
 Total cost 1˙499˙588 €
 EC max contribution 1˙499˙588 € (100%)
 Programme 1. H2020-EU.1.1. (EXCELLENT SCIENCE - European Research Council (ERC))
 Code Call ERC-2018-STG
 Funding Scheme ERC-STG
 Starting year 2019
 Duration (year-month-day) from 2019-02-01   to  2024-01-31


Take a look of project's partnership.

# participants  country  role  EC contrib. [€] 


 Project objective

This project aims to develop a universal approach to angular momentum in quantum many-body systems based on the angulon quasiparticle recently discovered by the PI. We will establish a general theory of angulons in and out of equilibrium, and apply it to a variety of experimentally studied problems, ranging from chemical dynamics in solvents to solid-state systems (e.g. angular momentum transfer in the Einstein-de Haas effect and ultrafast magnetism).

The concept of angular momentum is ubiquitous across physics, whether one deals with nuclear collisions, chemical reactions, or formation of galaxies. In the microscopic world, quantum rotations are described by non-commuting operators. This makes the angular momentum theory extremely involved, even for systems consisting of only a few interacting particles, such as gas-phase atoms or molecules.

Furthermore, in most experiments the behavior of quantum particles is inevitably altered by a many-body environment of some kind. For example, molecular rotation – and therefore reactivity – depends on the presence of a solvent, electronic angular momentum in solids is coupled to lattice phonons, highly excited atomic levels can be perturbed by a surrounding ultracold gas. If approached in a brute-force fashion, understanding angular momentum in such systems is an impossible task, since a macroscopic number of particles is involved.

Recently, the PI and his team have shown that this challenge can be met by introducing a new quasiparticle – the angulon. In 2017, the PI has demonstrated the existence of angulons by comparing his theory with 20 years of measurements on molecules rotating in superfluids. Most importantly, the angulon concept allows one to gain analytical insights inaccessible to the state-of-the-art techniques of condensed matter and chemical physics. The angulon approach holds the promise of opening up a new interdisciplinary research area with applications reaching far beyond what is proposed here.

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

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