### Causal dynamical triangulations (CDT)

The geometry of spacetime can be calculated with the theory of **causal dynamical triangulations**.

##### Explanation

The dimensions in space (length, width, height) and the dimension in time together form the spacetime. In CDT, time enables the notion of causuality − the requirement that cause comes before effect.

In these calculations, the path integral suggests that the universe we see is really a quantum combination of all possible spacetime shapes. In this way, quantum gravity can be understood in accordance with the general theory of relativity.

## HistoryGerman physicist Renate Loll (1962) describes spacetime and gravity in this way. |