# Entropy versus the Action in Causal Set Theory

### APA

Surya, S. (2023). Entropy versus the Action in Causal Set Theory. Perimeter Institute. https://pirsa.org/23030103

### MLA

Surya, Sumati. Entropy versus the Action in Causal Set Theory. Perimeter Institute, Mar. 09, 2023, https://pirsa.org/23030103

### BibTex

@misc{ pirsa_23030103, doi = {10.48660/23030103}, url = {https://pirsa.org/23030103}, author = {Surya, Sumati}, keywords = {Quantum Gravity}, language = {en}, title = {Entropy versus the Action in Causal Set Theory}, publisher = {Perimeter Institute}, year = {2023}, month = {mar}, note = {PIRSA:23030103 see, \url{https://pirsa.org}} }

Sumati Surya Raman Research Institute

## Abstract

The Lorentzian path sum in causal set theory(CST) can be defined using the discrete EInstein-Hilbert or Benincasa-Dowker-Glaser(BDG) action. It has been a long standing question in CST whether the path sum is dominated by a class of non-continuum like layered posets — this would make it much harder to find a dynamically generated continuum approximation — or whether the BDG action suppresses this contribution. In this talk I will discuss a series of results that show that to leading order in the saddle point approximation, this dominating class of layered posets is strongly suppressed. Moreover this is true for a more general class of actions which include the BDG action. We conclude with some remarks on the interpretation of these results and related open questions.

Zoom link: https://pitp.zoom.us/j/91794153633?pwd=TTFnS0hpQ2s5eFVDM3k5ZDkxcndkUT09