ANALOGUE GRAVITY · Gravitational physics from the analogue gravity perspective
6РП — Действия „Мария Кюри“
- Период
- 2004-06-01 → 2005-05-31
- Финансиране от ЕС
- 21 959 €
- Участници
- 1
- Схема
- ERG
Линиите свързват координатора с партньорите.
Накратко на български
Аналоговата гравитация изследва приликите между разпространението на вълни в изкривено пространство-време и сигнали в течности, като например звукови вълни в движещи се флуиди. Това позволява създаването на лабораторни модели на черни дупки за по-добро разбиране на гравитационната физика.
Кратко обяснение, генерирано от езиков модел по текста на CORDIS. Оригиналът е по-долу.
Резултати накратко
Final Activity Report Summary - ANALOGUE GRAVITY (Gravitational physics from the analogue gravity perspective)
The physics associated with the propagation of waves in a curved spacetime, like the universe in which we live, is formally equivalent to the propagation of different signals in condensed matter systems. The simplest example is the propagation of acoustic waves in inhomogeneously moving (irrotational) fluids. Currently, researchers are taking advantage of this fact to, on the one side, try to reproduce scale models of black holes and other interesting spacetime geometries in earth based laboratories and, on the other side, obtain new insights in gravitational physics by addressing some of its problems under the light of the notions and techniques proper of condensed matter physics (I would like to highlight that the inter-connexions between gravity and condensed matter have been barely unexplored up to now). The work performed under the ERG support has been centred on this line of research currently known as analogue models of general relativity or analogue gravity. The main outcome of this one-year period has been the publication of an extensive review article (to appear in 'Living Reviews on Relativity') on analogue gravity. In this article, it is described the present state of the art of the research area pointing out which are in our view the most interesting problems to be addressed now on. We (me and my collaborators) have tried to write the article in a manner as pedagogical as possible, making the article useful as an introduction to the field for new graduate students. Apart from this article, I have published another paper analysing the causal properties of a catalogue of spacetime geometries containing horizons selected because their naturalness from the point of view of acoustic systems. These geometries are from the point of view of acoustics equivalent to the characterisation of different black holes by their mass and charge. The analysis on this paper provide new insights about the most appropriate ways to reproduce different aspects of black hole physics in laboratory. In addition, it shows from a condensed matter perspective what is the meaning of analytical extensions of geometry.
Текст от CORDIS, на английски · Данни: CORDIS, © Европейски съюз
Цел на проекта
Analogue models of General Relativity (GR) are condensed/matter/quantum optics systems that in certain regimes reproduce the physics of fields propagating over curved spacetimes. Essentially, the idea behind most of these models is that, in a flowing fluid , the propagation of acoustic waves is controlled by an effective Lorentzian metric that depends on the characteristic of the flow. In this project we propose to investigate several types of gravitational configurations from the analogue gravity perspectiv e. In particular, we want to analyse the prospects for creating artificial black holes, scale models of cosmplogical universes and artificial braneworld geometries. We will concentrate in one of the most promising analogue systems proposed up to now, Bose-Einstein condensates in dilute gases. First, we propose to analyze the requirements for constructing configurations with at least a black hole horizon (acoustic horizon), and with a long-enough period of dynamical stability so as to serve as a background i n which to observe the analogue of Hawking and apos;s evaporation process. We plan to investigate the different types of instabilities that could appear on this endeavour and the possibilities to circumvent them. On the conceptual side, we want to see whet her Hawking radiation phenomenon is robust against super- luminar modifications of the dispersion relations. Second, we want to analyze the possibilities that these systems offer for creating scale models of cosmologically expanding universes. The current ability of modifying the strength of the interaction in Bose-Einstein condensate opens up an interesting possibility. We want to investigate these configurations and its semiclassical consequences, that is, their associated cosmological particle production . We are particularly interested on how the modifications to this phenomenon when considering high energy corrections to field propagation. Finally, we are interested in braneworld analogue models.
Оригинален текст от CORDIS (на английски).
Участници
- CONSEJO SUPERIOR DE INVESTIGACIONES CIENTIFICAS · MADRIDКоординаторИспания
Връзки
Данни: CORDIS, © Европейски съюз