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Can matter, energy, or information travel from one universe to another in a Level I Multiverse? That is, is there any communication between Hubble volumes in an eternal inflation-induced multiverse?

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The answer is no by definition, since level 1 universes are separated by a cosmological horizon. If they weren't separated by a horizon they wouldn't be seperate level 1 universes.

It's a general feature of separate universes that they are causally disconnected. It's the fact of causal disconnection that makes us treat them as separate.

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  • $\begingroup$ so according to this and what we know you're saying that it's not possible for any kind of matter,energy or information travel between any universes right? (i don't know why but i feel a little bit happy bout this) $\endgroup$ – Andrea Scaglioni Jul 26 '13 at 14:38

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