# Path Integrals on Causal Sets

Path Integrals on Causal Sets

This shows a randomly generated causal set. The "start position" and "finish position" denote spacetime locations within the causal set. Specifying the "number of steps" then draws all trajectories within the causal set from the start to the specified final step. To perform a quantum mechanical path integral each trajectory of length is assigned an amplitude (a complex number) . Summing these amplitudes for all trajectories from the start to the finish gives the total amplitude for a particle to travel from the start to the finish.

n

n

a

n-1

b