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The first lecture of the series (18 October) is already online.
http://pirsa.org/C10020
The series is called Invitation to Causal Sets.
http://pirsa.org/C10020
The series is called Invitation to Causal Sets.
Kevin_Axion said:I hope you don't mind ...
marcus said:Dowker and Sorkin are going to argue that there is a natural connection between discrete and Lorentz---that's something I never heard of. Very strange. They have at least an heuristic or suggestive case to make that the causality structure of spacetime is 90 percent of its geometry, and that spacetime is Lorentzian BECAUSE it is discrete.
atyy said:"That's something you can ask of any theory of quantum gravity: at the end, are you going to take the continuum limit?"
Fra said:But then the question is, what about the total complexity of the causal set? If that -> infinitiy then they loose me, as it represents the limit of infinite computational power and memory.
marcus said:Dowker and Sorkin are going to argue that there is a natural connection between discrete and Lorentz---that's something I never heard of. Very strange. They have at least an heuristic or suggestive case to make that the causality structure of spacetime is 90 percent of its geometry, and that spacetime is Lorentzian BECAUSE it is discrete.
Fra said:I am starting to like this guy Kevin Knuth has what seems to me a pretty good and attractive line of reasoning. I will definitely try to read some of the referencing papers. I particularly like the connection he makes to foundations of quantum theory...
marcus said:I was impressed. Knuth has another paper here:
http://arxiv.org/abs/1009.5161
also impressive.
Some of us will have to start following his research. Thanks for the tip.
marcus said:I was impressed. Knuth has another paper here:
http://arxiv.org/abs/1009.5161
also impressive.
Some of us will have to start following his research. Thanks for the tip.
Causal sets are a mathematical framework used to describe the structure of spacetime in quantum gravity theories. They consist of discrete elements, or "events", that are causally related to one another.
Causal sets provide a way to reconcile the discreteness of quantum mechanics with the smoothness of general relativity, offering a potential solution to the problem of quantum gravity. They also have implications for understanding the nature of time and the emergence of spacetime.
The goal of the Causal Sets lectures is to introduce and explain the concepts and applications of causal sets in quantum gravity theories. The lectures aim to provide a comprehensive understanding of the mathematical framework and its implications for fundamental physics.
While a basic understanding of physics and mathematics is helpful, the lectures are designed to be accessible to a wide audience. The concepts and principles will be explained in a clear and concise manner, making them suitable for anyone interested in learning about causal sets.
The videos of the Causal Sets lectures can be accessed through various online platforms, such as YouTube or the website of the institution hosting the lectures. Links to the videos will also be provided on the official website of the lectures or through social media platforms.