Category: multiverse

Physicists Study How Universes Might Bubble Up and Collide

Post author By geoff
Post date January 25, 2021

Physicists Study How Our Universe Might Have Bubbled Up in the Multiverse | Quanta Magazine

“The multiverse hypothesis sprang from efforts to understand our own universe’s birth. In the large-scale structure of the universe, theorists see signs of an explosive growth spurt during the cosmos’s infancy. In the early 1980s, as physicists investigated how space might have started — and stopped — inflating, an unsettling picture emerged. The researchers realized that while space may have stopped inflating here (in our bubble universe) and there (in other bubbles), quantum effects should continue to inflate most of space, an idea known as eternal inflation.”

multiverse

Post author By geoff
Post date January 7, 2021

https://www.vice.com/en/article/z3vq8x/scientists-think-the-multiverse-might-be-the-key-to-explaining-dark-matter

What’s more, the new study hints at the existence of a multiverse, in which our universe is just one of many in a broader and more complex structure. If there is an “outside” to our universe, then an external observer might see the entirety of everything we know—stars, galaxies, and billions of light years of space—as a puny primordial black hole.

“We still don’t know what dark matter is made of, but, since the black holes are known to exist, it is natural to ask whether dark matter could be composed of black holes that could form before the stars and galaxies formed,” said Alexander Kusenko, an astrophysicist at UCLA who led the new study, in an email.

Quantum Jerks (or God?)

Post author By geoff
Post date September 2, 2020

https://thenextweb.com/insights/2020/09/01/thought-experiment-shows-how-we-might-be-at-the-mercy-of-quantum-jerks-from-another-universe/

“There’s a conversation about the existence of God to be had here – Halloway eludes to this at the end of his article with a comment about intelligent design – but we’re more interested in the technology side of things.”

multiverse philosophy Physics

Boltzman Brains

https://en.wikipedia.org/wiki/Boltzmann_brain

TLDR: It’s more likely that a human brain (complete with human thoughts/memories) snaps into existence than it is for our Universe to exist with us in it. It’s actually more likely that we are all Boltzman brains.

It’s completely bonkers, and that’s the point. The fact that our Universe is exists in the way it does is completely bonkers. This example is meant to highlight that.

Eternity multiverse Physics

We are probably definitely living in a multiverse..

Post author By geoff
Post date November 18, 2019

https://interestingengineering.com/we-probably-are-living-in-a-multiverse-heres-why

Probably.. the click-bait title was “definitely”. There really aren’t a lot of great alternatives apart from a creator. If AI villagers in a computer game developed “souls” they would say the same thing.. and they wouldn’t be wrong. There are an infinite number of Minecraft “universes”.

multiverse Physics

Space Foam

Post author By geoff
Post date October 24, 2019

https://www.vice.com/en_us/article/j5yngp/the-universe-is-made-of-tiny-bubbles-containing-mini-universes-scientists-say

The headline says it all.. the universe is made of bubbles containing tiny universes. Of course. The best part is how they talk about this as if it makes complete sense and is 100% proven fact.

multiverse

Multiple Worlds

https://www.wired.com/story/sean-carroll-thinks-we-all-exist-on-multiple-worlds/

What is reality?

Carroll: The best answer we can give is that reality is a vector in Hilbert space. This is the technical way of saying that reality is described by a single quantum mechanical wave function.

OK, that’s abstract. Please conceptualize this?

We see tables and chairs and people and planets moving through spacetime. Quantum mechanics says that there are no such things as tables and chairs—there’s just something we call a wave function.

Our classical description of the world is a higher level, approximate way of talking about the wave function. The job of physicists and philosophers is to show how, if we live in a world that is just a wave function, then why does it look like there are people and planets and tables and chairs? We don’t have a definite consensus.

multiverse