H2020Индивидуална стипендия2017–2020

sharpEDGE · From Bulk to Edge: Realization and Characterization of Fractionalized Quantum Matter

„Хоризонт 2020“ — Действия „Мария Склодовска-Кюри“

Период: 2017-10-01 → 2020-09-30
Финансиране от ЕС: 215 699 €
Участници: 3
Схема: MSCA-IF-GF

Линиите свързват координатора с партньорите.

Накратко на български

Екзотични състояния на материята, като частиците-аниони, се изследват чрез свързване на суперпроводници с двуизмерни материали. Това помага за разработването на квантови компютри, които са по-устойчиви на грешки при изчисленията.

Този кратък обзор е генериран от изкуствен интелект

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

Резултати накратко

From Bulk to Edge: Realization and Characterization of Fractionalized Quantum Matter

Quantum effects, topology and strong interactions act together to produce a vast array of exotic phases of matter at low temperature in physical systems as varied as 2D materials, superconducting quantum circuits or ultracold atomic gases. Powerful concepts have arisen from the study of this trio, describing collective phenomena with no equivalent in single-particle systems. For example, anyons are particles which behave like a fraction of an electron; they do not exist as fundamental particles, but emerge as collective excitations in the fractional quantum Hall effect. The first objective of this project was to determine how to realize a device made by coupling the edges of a fractional quantum Hall (FQH) system with a superconductor, a set-up which is currently envisioned to realize a qubit for quantum computation intrinsically immune to decoherence. The second objective was to design experimental protocols to detect strongly interacting phases in systems (such as cold atoms, or some solid state systems) where these protocols are not available. This action resulted in important advances on both fronts: we showed numerical evidence for the emergence of a topological qutrit in a FQH-superconductor device, and predicted that FQH states could emerge in the absence of a magnetic field in realistic 2D moire materials. We also provided practical protocols to detect strongly correlated quantum phases using methods available in cold atomic gases.

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

Цел на проекта

Most phases of matter can be understood using the concept of symmetry breaking. For example, the organization of water molecules in an ice crystal breaks the continuous translational symmetries that are preserved in liquid water. The discovery of the quantum Hall effect triggered a revolution of this concept. It was the first example of topological order, a type of order that cannot be detected with any local measurement and supports exciting new properties. A striking example is the universal transport properties which are so robust that metrologists use them to define the quantum of conductance. Additionally, exotic particles with fractionalized quantum numbers called anyons may emerge as collective excitations of these systems and could provide a route to fault-tolerant quantum computing. Despite the increasingly good theoretical understanding of fractionalized phases, there is a strong need to relate the theories to experimentally relevant models.sharpEDGE will build new bridges between the effective and microscopic descriptions of fractionalized phases of matter. This requires us to solve a cumbersome quantum many-body problem. Numerical methods are essential here: they have accompanied the progress of the field since its early days, and the most recent developments give hope to solve some long-standing issues. We will thus apply a multidisciplinary approach combining the latest advances in topological quantum field theory, quantum information, and material science. Fractionalization may occur in gapped systems such as the fractional quantum Hall effect, lattice topological insulators or frustrated magnets, but also in exotic metallic phases. In this context, we will explore the microscopic relation between the edge and the bulk of gapped topological phases, and develop new characterization tools for gapless phases.

Оригинален текст от CORDIS (на английски).

Участници

CENTRE NATIONAL DE LA RECHERCHE SCIENTIFIQUE CNRS · ParisКоординаторФранция
MASSACHUSETTS INSTITUTE OF TECHNOLOGY · CambridgeСъединени щати
TECHNISCHE UNIVERSITAET MUENCHEN · MuenchenГермания