QUANTUMGASES · Quantum gases: understanding their dynamics and improving simulation methods
6РП — Действия „Мария Кюри“
- Период
- 2006-10-18 → 2008-10-17
- Финансиране от ЕС
- 151 982 €
- Участници
- 1
- Схема
- EIF
Линиите свързват координатора с партньорите.
Накратко на български
Квантовите газове се изследват чрез проследяване на това как атомите преминават от поведение като вълни към поведение като частици, например при сблъсъци на Бозе-Айнщайн кондензати. Новите методи за симулация позволяват по-точното изчисляване на тези процеси за по-дълги периоди от време.
Кратко обяснение, генерирано от езиков модел по текста на CORDIS. Оригиналът е по-долу.
Резултати накратко
Final Activity Report Summary - QuantumGases (Quantum gases: understanding their dynamics and improving simulation methods)
In the rapidly expanding field of cold atom research atoms that we used to thinking of as particles behave as a collective wave to a degree that was unknown before on a macroscopic scale since, historically, wave behaviour of particles was only well known for photons or tiny objects on the atomic scale. In recent years, some research components moved into a further direction, in which the atoms were dynamically caused to behave, again, in a particle-like manner as time progressed. They might then also revert back to a wave-like nature, and so forth. An example are the fast collisions of the wave-like Bose-Einstein condensates, in which scattered matter is best described again as particles, or single atoms. However, under the right conditions these scattered particles can begin to accumulate more around each other, eventually forming their own wave-like state again, which is called a phase grain. A hindrance here was that, in many cases, it was not possible to compute beforehand what dynamics would occur, or to perform calculations after the experiment to check whether what was seen corresponded to what was thought to be happening. The problem was that the standard quantum mechanical description did not fit in any computer, while more subtle methods fit but did not allow for long enough calculations to compare with most experiments. The aim of this project was to develop more cunning descriptions of these systems that would be computationally tractable and give results for long evolution. Such an improved description was indeed developed. This made possible to calculate the dynamics for much longer times and for a much broader class of problems than before. In fact, calculations for several cases were already made in the course of the project.
Текст от CORDIS, на английски · Данни: CORDIS, © Европейски съюз
Цел на проекта
Research is planned into the dynamics of ultra-cold quantum gases in strong interaction and non-perturbative regimes, as well as into developing improved methods for quantitative simulation of their dynamics. While experiments in this field now regularly r each strong interaction regimes, their theoretical understanding and quantitative description often lags behind due to a scarcity of non-perturbative methods.Research into improved simulation methods is essential for understanding the dynamics in the new regimes. Investigation would include strongly-interacting gases caused e.g. by being close to a Feshbach resonance or in a confined geometry, as well as the behaviour of Fermi gases near the BCS crossover and BEC collisions. 24 months of research are proposed with the theory group of G. V. Shlyapnikov at the LPTMS lab, Universite Paris-Sud XI in Orsay, France.This research group is world-renowned for conceptual understanding and analytic calculations of the quantum gases, especially cold Fermi gases and strongly-interacting regimes. These skills are directly complementary to the applicant's present competencies (strong emphasis in numerical methods for cold Bose gases). The host group also has numerous collaborations with leading experimentalists and theoreticians in the field (including locally in Paris). This will further diversify the applicant's competencies by enabling regular contact with the experimental issues in the discipline.The applicant's research track record includes publications in high impact journals and significant independent research. Upon mastering the above skills, the applicant will have reached a well-rounded position of scientific maturity in the field. To intensify international co-operation, the applicant plans to continue collaboration with his former research group in Australia and with present collaborators in Poland during the project.
Оригинален текст от CORDIS (на английски).
Участници
- UNIVERSITE PARIS-SUD · ORSAYКоординаторФранция
Връзки
Данни: CORDIS, © Европейски съюз