H2020Индивидуална стипендия2015–2017

YbQuantumSim · Quantum simulation of novel many-body phenomena with Ytterbium atoms in optical lattices

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

Период: 2015-07-01 → 2017-06-30
Финансиране от ЕС: 159 461 €
Участници: 1
Схема: MSCA-IF

Линиите свързват координатора с партньорите.

Накратко на български

Свойствата на ултрастудени атоми на иттербий в оптични решетки се използват за симулиране на сложни квантови състояния, като например тези при свръхпроводниците. Това помага за разбирането на механизмите за електрическо провеждане и създаването на по-ефективни материали за медицината и транспорта.

Този кратък обзор е генериран от изкуствен интелект

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

Резултати накратко

Quantum simulation of novel many-body phenomena with Ytterbium atoms in optical lattices

The experimental study of materials and their description using physical models have been core issues in modern physics since its foundation. In spite of the remarkable achievements, many important questions have been eluding condensed matter physicists for many decades. A famous example are high-temperature superconducting materials, which were discovered in the 1980s, but whose underlying superconductivity mechanism still remains to be clarified. These materials have nowadays important technological applications, such as in transportation and medicine. Reaching a full understanding could guide chemists to develop new and much more efficient superconductors, with a major economic impact. The difficulties that hinder the progress of our understanding in condensed matter physics are both experimental and theoretical. On the one hand, materials have complex chemical structures, which are hard to describe, and their quality and variability are limited. On the other, even the most simple models can be too difficult to solve analytically or numerically. Probing ultra-cold fermionic atoms trapped in optical lattices is a novel approach to tackle the difficult problems in condensed matter physics. These systems have a very high degree of controllability and versatility (the atomic potentials can be tailored almost at will) and are free of imperfections. Therefore they provide a powerful platform to simulate open condensed matter problems and probe the relevant many-body quantum states. This project aims to explore multi-orbital physics using fermionic ytterbium atoms and investigate its role in quantum magnetism and electric conduction. In a first part, we were able to quantum simulate the Fermi-Hubbard model with SU(N)-extended symmetry. Secondly, we investigated the inter-orbital interactions and discovered an original orbital-induced Feshbach resonance. Thirdly, we prepared a system capable of simulating Kondo and Kondo-lattice physics.

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

Цел на проекта

This project proposes to explore multi-orbital physics with ensembles of ultracold fermionic Ytterbium atoms.Ensembles of ultracold atoms are well-understood quantum systems which are distinguished by a high degree of experimental control of their parameters. Such ensembles are very versatile, since the light fields and magnetic fields which define them can be tailored almost at will, while at the same time most imperfections such as lattice defects are not present. These attributes open the door to the investigation of a broad class of interesting quantum many-body model phenomena. By designing systems which are governed by the same Hamiltonian as those which apply to, for example, a specific condensed matter system, ultracold atoms can be used as flexible quantum simulators.The aim of this project is to study a system of Ytterbium atoms in state-dependent optical lattice potentials, specifically tailored for accessing many-body phenomena related to three aspects of quantum magnetism and electric conduction: (1) opening the field of Kondo physics and Kondo lattice physics for investigation with cold atoms, (2) enabling the implementation of SU(N) extended symmetry many-body systems, and (3) providing the possibility to implement artificial gauge fields with strong coupling. The experiment is specifically set up to for the requirements imposed by these goals. Ytterbium atoms are chosen for this due to their particular electronic structure enabling the use of internal states to implement the two-orbital structure necessary for Kondo physics, and specific optical lattice potentials are used for emulating the crystal. On the one hand, this will enable new insights into the phases and phase transitions of the Kondo lattice model. On the other hand it opens a possible new route to implementing quantum magnetism in optical lattices, a central topic of the field. In addition, the model can be extended to the fundamentally new, extended-symmetry SU(N) spin systems.

Оригинален текст от CORDIS (на английски).

Участници

MAX-PLANCK-GESELLSCHAFT ZUR FORDERUNG DER WISSENSCHAFTEN EV · MUNCHENКоординаторГермания