I think this one is a good introduction https://arxiv.org/abs/1105.0183ohwilleke said:Do you have a link explaining Barbour's Shape Dynamics?
I also really like this talk by Gomez, one of the founders:ohwilleke said:Do you have a link explaining Barbour's Shape Dynamics?
Shape Dynamics is a theoretical framework in physics that focuses on the relational aspects of space and time, emphasizing the shapes formed by the configuration of particles rather than their positions in an absolute space. It is considered an alternative to General Relativity and aims to resolve some of its conceptual issues.
Shape Dynamics is a classical theory that deals with the geometry and relational properties of space and time, while Quantum Mechanics is a fundamental theory in physics that describes physical phenomena at the smallest scales, such as particles and their interactions. Quantum Mechanics incorporates probabilistic elements and wave functions, whereas Shape Dynamics is deterministic.
Reconciliation between Shape Dynamics and Quantum Mechanics is an ongoing area of research. Some physicists believe that a deeper understanding of Shape Dynamics could provide insights into quantum gravity, potentially leading to a unified framework that incorporates both theories. However, this reconciliation is not yet fully established.
Experimental tests for Shape Dynamics are challenging because the theory primarily offers a different conceptual understanding rather than specific new predictions. However, researchers are investigating scenarios where Shape Dynamics might produce observable differences from General Relativity, such as in cosmological models or black hole physics. These differences could potentially be tested through precise astronomical observations or gravitational wave measurements.
Shape Dynamics is still a relatively new and developing field, and it is not as widely accepted or established as Quantum Mechanics or General Relativity. While it has garnered interest and has shown promise in addressing certain theoretical issues, it remains a niche area of research. More work and experimental validation are needed for it to gain broader acceptance.