Simulating the Universe Could Yield Quantum Mechanics

> Testing our hypothesis

> We set up the apparatus used to test Bell’s inequality. Entangled photons emerge from a source and head in opposite directions. Eventually they get their polarizations measured. We allow the first photon in the pair to enter a double slit experiment. As it passes through the double slit, it interferes with itself, producing a wavelike diffraction pattern on the detector.

It's a confusing paragraph. It i possible to do the double slit experiment with polarized or not polarized, entangled or non entangled photons (and all the combinations, and a few more). All of them produce the same result.

> Then we change the experiment by measuring the second photon in the pair before the first photon reaches the double slit. This will break the entanglement, causing both photons to enter well-defined polarization states. When this happens, the first photon will behave like a particle as it passes through the double slit experiment.

Measuring the double slit experiment with entangled photons to get the same result in both is theoretically possible, but in practice it's impossible to align the grids with enough precision. So the experiments to measure the Bell's inequality use polarization instead. The QM rules that predict the pattern in the double slit experiment are the same that predict the result with polarization.

Once you make a setup to measure the Bell's It's very easy to make any of the arm longer, to ensure which photons arrive first to the measurement part. The experimental result is that it doesn't mater. If you see only the result of one photon it doesn't matter if the other photon arrived to the other extreme of the device earlier of later.

So a variant of this prediction has been already tested, and the experiments disagree with the prediction.