BEYONDGR-2009-TPS · Gravity beyond General Relativity
7РП — „Хора“ (Действия „Мария Кюри“)
- Период
- 2010-07-01 → 2011-04-30
- Финансиране от ЕС
- 164 041 €
- Участници
- 1
- Схема
- MC-IIF
Линиите свързват координатора с партньорите.
Накратко на български
Гравитацията се изследва чрез алтернативни теории, като например квантовата гравитация, за да се проверят границите на Общата теория на относителността. Това помага да се разбере по-точно как работи гравитационното взаимодействие във Вселената.
Кратко обяснение, генерирано от езиков модел по текста на CORDIS. Оригиналът е по-долу.
Резултати накратко
Gravity beyond General Relativity
Project objectives The overall goal of the project is to shed light on the limits of 'general relativity' as a theory for gravitational interaction. This is expected to be achieved by, more specifically: -a) proposing/developing alternative theories of gravity both classical and quantum; -b) studying their cosmological and astrophysical phenomenology; -c) confronting the predictions of such theories with observations and experiments and obtaining the relevant constraints. The project was interrupted early because the researcher moved away from the host institute in order to start a tenure-track appointment as an assistant professor. However, significant progress has been achieved towards the overall goal, and all the objectives of the first period have been met. Project results The work done in this period focused on three specific gravity theories which are currently in the forefront of interest: Horava-Lifshitz gravity, f(T) gravity and metric-affine theories. The achievements of this period include: -a) The significant development of Horava-Lifshitz gravity as a candidate for quantum gravity; -b) The demonstration that f(T) is in fact a Lorentz-violating theory of gravity, which had been missed previously in the literature and changed the perspective toward this theory; -c) The development of an effective field theory framework for metric-affine gravity theories. All these result have had an important impact in their respective scientific fields and have already been highly cited.
Текст от CORDIS, на английски · Данни: CORDIS, © Европейски съюз
Цел на проекта
General relativity, Einstein's celebrated theory, has been very successful as a theory of the gravitational interaction. However, within the course of the last decades several issues have been pointed out as indicating it limitations: the inevitable existence of spacetime singularities and the fact that it is not a renormalizable theory manifest as shortcomings at very small scales. The inability of the theory to explain the late time accelerated expansion of the universe or the rotational curves of galaxies without the need of unobserved, mysterious forms of matter/energy can be interpreted as shortcomings at large scales. These riddles make gravity by far the most enigmatic of interactions nowadays. Therefore, the understanding of gravity beyond general relativity seems to be more pertinent than ever. We propose to address this difficult issue by considering several different paths towards the understand of the limitations of general relativity and the study of phenomenology which is usually considered to be outsides its realm. The proposed directions include, but are not limited to: extensions or modifications of the theory which may address renormalizability issues or cosmological observations; the study of the effective action of more fundamental theories and their phenomenology; the explorations of fundamental principles of general relativity and the possible violation of such principles; the implications of deviations from Einstein's theory for astrophysics and cosmology and the possible ways to constrain such deviations; and the study of effects within the framework of general relativity which lie at the limit of its validity as a gravity theory. The deeper understanding of each of these issues will provide an important piece to the puzzle. The synthesis of these pieces is most likely to significantly aid our understanding of gravity, and this is our ultimate goal.
Оригинален текст от CORDIS (на английски).
Участници
- THE CHANCELLOR MASTERS AND SCHOLARS OF THE UNIVERSITY OF CAMBRIDGE · CAMBRIDGEКоординаторОбединеното кралство
Връзки
Данни: CORDIS, © Европейски съюз