system
Given the following post, respond as if you're commenting on Reddit:
human
What is the logical basis behind the multiverse theory? In other words, what does the multiverse theory attempt to prove or answer?
gpt
It is intended to explain some of the weird effects of quantum mechanics, most famously, the results of double-slit experiment. In the quantum version of this experiment, a single photon of light was sent at two slits and the scientists did not observe which slit it went through. After several photons were sent through one at a time, the scientists expected to see a projection of the slits on a screen behind the slits. However, they instead saw an interference pattern, the same that appears if many photons are sent through the slits together.

Multiverse theory is one of two major proposed explanations for this. It suggests that in cases of probability such as which slit the photon travels through, the universe splits into two universes for each option. Furthermore, on very small scales such as those of single photons, the universes can interact with each other, and the photon can interfere with its counterpart in the other universe.