Re:Are Physical Laws Inevitable?
by dragonwriter on Thursday December 12, 2019 @07:48PM
(#21778156)
> I am not a physicist, but one can definitely come up with thought experiments about testing the multiverse.
No you can't, because it is logically impossible. If you can experience effects that it causes, it isn't a separate universe. To test it, you must observe effects caused by it's existence that would not be expected to be present if it did not exist. Ergo, you cannot test the existence of other universes.
> One could imagine creating a universe in a lab "from nothing" since there's a hypothesis that the energy of a universe could be zero
Sure. But you can't ever observe that you have created it (or, more precisely, you can't ever observe anything that would distinguish what you have created as another universe, only as an object in our universe.)
Not that, even if it were possible to observe, creating universes in the lab would in any way test multiverse-based cosmological speculations.
No you can't, because it is logically impossible. If you can experience effects that it causes, it isn't a separate universe. To test it, you must observe effects caused by it's existence that would not be expected to be present if it did not exist. Ergo, you cannot test the existence of other universes.
> One could imagine creating a universe in a lab "from nothing" since there's a hypothesis that the energy of a universe could be zero
Sure. But you can't ever observe that you have created it (or, more precisely, you can't ever observe anything that would distinguish what you have created as another universe, only as an object in our universe.)
Not that, even if it were possible to observe, creating universes in the lab would in any way test multiverse-based cosmological speculations.