# Quantum cosmology from first principles: second thoughts

### APA

Smolin, L. (2023). Quantum cosmology from first principles: second thoughts. Perimeter Institute. https://pirsa.org/23100057

### MLA

Smolin, Lee. Quantum cosmology from first principles: second thoughts. Perimeter Institute, Oct. 11, 2023, https://pirsa.org/23100057

### BibTex

@misc{ pirsa_PIRSA:23100057, doi = {10.48660/23100057}, url = {https://pirsa.org/23100057}, author = {Smolin, Lee}, keywords = {Other}, language = {en}, title = {Quantum cosmology from first principles: second thoughts}, publisher = {Perimeter Institute}, year = {2023}, month = {oct}, note = {PIRSA:23100057 see, \url{https://pirsa.org}} }

Lee Smolin Perimeter Institute for Theoretical Physics

## Abstract

I argue that the answer is yes, by reviewing the history and current status of such a theory. Since 1982, I have been developing a series of such theories, beginning in 1982 with an N --> infinity limit of 2+1 dimensional matrix model (the IAS model), through another N --> infinity, T --> 0 limit of a BFSS model. During this time our work was complemented by Adler's Trace model and others.

Beginning in 2012, Cortes and I developed a different approach to an relational quantum cosmology by adding intrinsic energy momentum to Sorkin et al's causal set models. The addition of energy- momentum as intrinsic variables opens up a new mechanism for the emergence of space, and spacetime, plus interacting relativistic particles. Note that the warm phase is purely algebraic, you need no prior existence of any space to get other dimensions to emerge. In 2021 I discovered how to derive quantum non-relativistic many body theory from what has since been called the Causal Theory of Views. Finally in papers since we report progress on the construction of special and general relativistic Causal Theory of Views.

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Zoom link: https://pitp.zoom.us/j/95891848248?pwd=TUpWK2RWbU9GTGxZS1lMeS81QWp1dz09