r/quantum • u/efsDqsszqfdf • 6d ago

Question Question inflaton

Selon la théorie d’un multivers inflationnaire,dans laquelle des « univers-bulles »naîtraient dans notre univers, la masse de ces univers ne devraient pas courber l’espace temps ? Je ne suis pas un pro de physique donc restez indulgent dans vos critiques svp

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u/Anonymous-USA 6d ago

Three reasons (within this model): first, universes are entirely self-contained, so they cannot interact in any way, even if overlapping in three spatial dimensions they are orthogonal (not intersecting) in another. Second, observable universes expand faster than light or gravitational waves could circumvent it (this has always been the case and will always be the case for our own observable universe). In short, the cosmic event horizon limits how much objects can affect your spatial location. In fact, 94% or more of the observable universe (~46B ly out) is beyond our cosmic event horizon (~20B ly). So a star can explode today in most galaxies and we will NEVER observe it — we won’t see the light or feel the gravitational waves. So this is true even within an observable universe (which is a subset of the whole universe) without introducing multiverses. But wait, there is a 3rd reason! Our universe is homogeneous and (supposedly) in an infinite multiverse model those are homogeneous too. Which means gravitational effects are cancelled out equally in all directions.