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## Crystalline gravityAdd to your list(s) Download to your calendar using vCal - 't Hooft, G (Utrecht)
- Friday 27 March 2009, 14:00-15:00
- Seminar Room 1 Newton Institute.
If you have a question about this talk, please contact Mustapha Amrani. Algebraic Lie Theory Matter interacting classically with gravity in 3+1 dimensions usually gives rise to a continuum of degrees of freedom, so that, in any attempt to quantize the theory, ultraviolet divergences are nearly inevitable. We now decided to investigate matter of a form that only displays a finite number of degrees of freedom in compact sections of space-time. In finite domains, one has only exact, analytic solutions. This is achieved by limiting ourselves to straight pieces of string, surrounded by locally flat sections of space-time. We investigate the equations of motion for such forms of matter. Globally, the model is not finite, because solutions tend to generate infinite fractals. The model is not (yet) quantized, but could serve as an interesting setting for analytical approaches to classical general relativity, as well as a possible stepping stone for quantum models. Details of its properties are explained, but some problems remain unsolved, such as a complete description of all possible interactions. This talk is part of the Isaac Newton Institute Seminar Series series. ## This talk is included in these lists:- All CMS events
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