Some physicists have proposed a method for testing if we are in a numerical simulated cubic space-time lattice Matrix or simulated universe with an underlying grid.
[1210.1847] Constraints on the Universe as a Numerical Simulation
Based on the assumption that there'd be finite computational resources, a simulated universe would be performed by dividing up the space-time continuum into individually separate and distinctive points. Analogous to mini-simulations that lattice-gauge theorists conduct to construct nuclei based on Quantum Chromodynamics, observable effects of a grid-like space-time have been studied from these computer simulations which use a 3-D grid to model how elementary particles move and collide with each other. Anomalies found in these simulations suggest that if we are in a simulation universe with an underlying grid, then there'd be various amounts of high energy cosmic rays coming at us from each direction; but if space is continuous, then there'd be high energy cosmic rays coming at us equally from every direction.
In a simulated universe, we'd expect to observe cosmic rays travelling predominately along the axes of the lattice of our simulated universe/Matrix in contrast to being observed emanating equally in all directions of unconstrained space; this implies the existence of a simulator ( a.k.a. -God)
High Energy Physics - Phenomenology
Constraints on the Universe as a Numerical Simulation
Silas R. Beane,
Zohreh Davoudi,
Martin J. Savage
(Submitted on 4 Oct 2012 (
v1), last revised 9 Nov 2012 (this version, v2))