Multiverses pt2

This is NOT science fiction con't

Episode Transcript

Speaker 1 (00:00):
Hello, people of the Internet. I cannot thank you enough
for stopping by. It's time another episode of the Science
Stuff to Blow Your Mind podcast, a show dedicated to
blowing your mind with science. You should be aware that
this episode is going to be a continuation of last

(00:23):
week's episode where we got into the wacky and wild,
wonderful world of the multiverse. No, folks, we're not talking
about science fiction here. We are talking about actual science.
You want to go back, because we covered a lot
and you will be absolutely lost. We covered the types

(00:47):
of multiverses. We covered principles, theories, simulations, we covered coalitions.
It's a big universe out there, and there's apparently a
lot of them. Let's start off with the role of

(01:11):
quantum mechanics in the multiverse. Quantum mechanics plays a central
role in many multiverse theories, particularly in the Many World's interpretation,
which states that every quantum event leads to a branching

(01:39):
of a new universe. Instead of particles being in superposition
of states, every possible outcome occurs in a different branching universe.

(02:02):
The role of quantum mechanics challenges our understanding of reality,
implying that all possible outcomes of quantum events are realized
in separate parallel universes. Next, let's take a look at

(02:27):
the string landscape, which refers to the multitude of possible
solutions in string theories equations, where each solution represents a
different universe with its own set of physical laws. The

(02:50):
large number of possible universes could explain why we observe
the fine tuned constant that make life possible in our universe.
The string landscape theory suggests a multiverse where different universes

(03:15):
could have vastly different properties depending on how the extra
dimensions of string theory fold and compactify. How does the
multiverse interact with the nature of time, Well, Time in

(03:37):
the multiverse could function very differently depending on which universe
you are in. In some time might run faster or slower,
or even loop on itself, or even loop loop on itself,

(04:03):
creating endless loops or parallel timelines. Some theories suggest that
time itself might be just one aspect of a deeper,
more fundamental reality that we can't fully perceive. The nature

(04:29):
of time could differ vastly from one universe to another,
leading to universes where past, present, and future may not
exist as we understand them. There are surely philosophical implications

(04:57):
of multiverses. If there are infinite universes, does this render
our actions meaningless? Are we just one version of ourselves
among countless others, with infinite versions of our decisions played

(05:24):
out across the multiverse. This could challenge ideas free will, purpose,
and the nature of reality itself. The existence of infinite

(05:44):
parallel worlds could force us to reconsider the meaning of existence, fate,
even consciousness. If everything then could happen does happen somewhere?
What does that mean for our personal experience of reality.

(06:13):
While there is no direct evidence of the existence of
a multiverse, some suggest that certain phenomena like the cosmic
microwave background radiation, could provide indirect evidence. Tiny irregularities in

(06:38):
this radiation might be the result of bubble collisions in
a multiverse scenario. Additionally, some string theorists argue that the
multiverse is a natural consequence of their models. The search

(07:02):
for indirect evidence includes looking for anomalies in cosmic radiation
or the possibility of detecting traces of other universes. The
many world's interpretation of quantum mechanics suggests that every quantum event,

(07:30):
like the spin of an electron or the position of
a particle, results in a branching of the universe into
multiple versions, each representing a different outcome. Let's take a
look at the different levels of multiverses. The level one

(07:56):
multiverse this refers to the possibility that our observable universe
is only part of a much larger universe that extends
beyond our observable horizon. The further regions of space might

(08:20):
have slightly different properties or initial conditions, but follow the
same fundamental laws of physics. The level one multiverse simply
suggests that the universe is vast with regions that are
beyond our observable reach, and may contain other regions with

(08:45):
identicals or slightly varying conditions. The level two multiverse suggests
that universes could form through eternal inflation, where regions of
space time continuously undergo inflation, creating separate bubbles or universes.

(09:11):
Each bubble could have its own physical laws, different constants,
or even different types of fundamental forces. The level two
multiverse arises from cosmic inflation, proposing that new universes can

(09:34):
spawn continuously from existing ones, leading to vastly diverse multiverse.
The level three multiverse, or the quantum multiverse, arises from
the Many World's interpretation of quantum mechanics. Every quantum event

(09:57):
creates a branching universe, with each possible outcome of an
event represented by a separate universe. And lastly, for today,
the level four multiverse is the most radical. It proposes
that every mathematically possible universe exists. This implies not just

(10:21):
universes with different physical laws, but also universes with entirely
different mathematical structures. The level four multiverse is the most abstract,
suggesting that any mathematical model that could describe a universe exists,

(10:43):
even that model is entirely alien to our understanding of physics.
I hope you've enjoyed this episode of the Science Stuff
to Blow your Mind podcast. I know my mind sure
is blown. I can't thank you enough for listening in
Until next time,