PIRSA:06090001

# Thermodynamics of spacetime

### APA

Jacobson, T. (2006). Thermodynamics of spacetime . Perimeter Institute. https://pirsa.org/06090001

### MLA

Jacobson, Ted. Thermodynamics of spacetime . Perimeter Institute, Sep. 06, 2006, https://pirsa.org/06090001

### BibTex

```          @misc{ pirsa_06090001,
doi = {10.48660/06090001},
url = {https://pirsa.org/06090001},
author = {Jacobson, Ted},
keywords = {Quantum Gravity},
language = {en},
title = {Thermodynamics of spacetime },
publisher = {Perimeter Institute},
year = {2006},
month = {sep},
note = {PIRSA:06090001 see, \url{https://pirsa.org}}
}
```

Ted Jacobson University of Maryland

Talk Type
Subject

## Abstract

I will first argue that the notion of black hole entropy extends universally to causal horizons. Then I will deduce the causal dynamics of spacetime from the equilibrium thermodynamics of causal horizons. Specifically, it will be shown how the Clausius relation dS = dQ/T between entropy change, energy flux, and acceleration temperature for all local causal horizons implies the Einstein equation, with Newton's constant determined by the universal horizon entropy density. Implications, non-equilibrium processes, and relations to AdS/CFT duality will also be discussed.