What is the key difference in physics between infinite space repetitions and eternal inflation multiverses?
Answer
In infinite space repetitions, the physics remains the same, whereas in eternal inflation, the physical constants vary between bubbles.
The model of infinite spatial extent predicts that the physics governing matter arrangements is consistent everywhere, leading to exact repetitions. In contrast, the eternal inflation model allows for localized regions (bubbles) to settle into different physical laws and constants upon slowing inflation.
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