But, is there any reality in these thoughts or they are only good for a sci-fi movie plot
Here’s a summary of this article
Explaining the 3 models
of parallel universe-here, I will explain the
3 models, with examples-
· Bubble universe model
· Membrane model
· Many worlds model
Understanding many
worlds-in this section, the 3rd the model will be elaborated further using a “cat” thought experiment
Energy conservation and
many worlds-various universes have
their energies less than fixed total energy (which is conserved)
Are your thoughts a reality in a different universe- NO, this is not true, because you imagine something that violates
laws of physics
How to travel to a
parallel universe-theoretically it can be
done using wormholes, but this method has some problems, which can be solved
exotic matter
So if we are able to find exotic matter, a door to a lot of new
possibilities will open up!
Parallel universe explained
A parallel universe is
basically an idea of having many other universes apart from our own
There are 3 models about
how these universes are present in space and time, how they are different, and
where they are present.
The 3 models are
1. bubble universe model
2. membrane(or simply brane) model
3. many worlds model(probably it exists)
#1 bubble universe model
As the name sounds, this model describes each universe as bubbles
1. These bubble universes are present so far away
from us
2. we may never be able to see them or they may
even be present inside the black holes
3. The laws of physics in these universes are very
different than that in our universe, this may be another reason we are not able
to see them
This theory may be hard
to digest for some, so let's move on to the next one
#2 membrane model
The membrane model is based
on string theory
1. some of the string theorists suggest that there
are actually 9 dimensions of space rather than just 3
2. This existence of other dimensions gives the
possibility of the existence of other universes in them
3. String theorists say that our world is a 3
dimensional surface in these 9 dimensions just like a piece of paper is a 2-dimensional object in our 3-dimensional world
4. This idea can be visualized as the pages of a
newspaper with each page being a complete universe
This model is largely
mathematical and has no experimental evidence, so we move to the next model
which is most likely to exist
#3 many-worlds model
This model comes from
the motivation to explain how particles can exist in different states all at
once
1. quantum mechanics (see my 8 topics guide to quantum mechanics) tells us that until an object is measured or observed it is in a
superposition of all its possible states at once
2. This is known as the quantum superposition
principle
3. The motivation to explain superposition gave
rise to the concept of parallel universe
Understanding many-worlds
For understanding
many-worlds hypothesis let's first understand quantum superposition with the help of Schrodinger's cat experiment
Suppose there is a cat
inside a box (through which you can’t see)
Here’s the question for you
Is the cat alive or
dead?
You may answer there is
a 50-50 chance of the cat being alive or dead
But, quantum mechanics
tells us that the cat is both alive and dead at the same time
So when you open the box
and find the cat alive, the cat is also dead but in a parallel universe
Understanding parallel universes-
Lets us analyze the cat the experiment we did above
1. As soon as the cat is kept inside the box along
with a bomb
2. it gets entangled with the bomb and everything
that's present inside the box (including the air molecules)
3. As we open the box we yourself get entangled
with everything that's inside the box
4. entanglement here we mean that the state of one the particle will affect the state of the other no matter how far apart they are
5. So the bomb's state will affect the cat's state
6. Meaning that if the bomb exploded the cat will
be dead and vice-versa
7. This means that when you open the box and we
found the cat alive, with the bomb unexploded, you also found the cat dead with
the bomb exploded
8. But that's not you, but a version of you a
parallel universe
Understanding the multiverse hypothesis by the law of energy
conservation
1. The law of energy conservation states that
energy can neither be created nor destroyed
2. the basic idea in understanding the multiverse hypothesis is that each universe is a subpart of the bigger whole
3. Each universe may look identical but, they
actually, contribute less than the total energy of the complete multiverse
4. thinking of a parallel universe in this way makes
it clear that each universe in many worlds hypothesis is a part of total energy
NOTE-
But with this
explanation, we still don't know how many such universes are there
Here’s another question for you
Is every thought in our the head is an event in another universe
Are there as many universes as your thoughts?
1. Many of our thoughts can actually be an event
taking place in another universe, but not all our thought can be an event
2. We may think of something impossible such as an
electron converting into a proton
3. There is a zero probability for this to happen
4. Because it violates the very fundamental laws of
conservation of mass and charge
How many universes are there?
· It can't be said for sure that there are a finite or infinite number of universes
· but, it can be said certainly that the number is
actually very large
Here’s the explanation
1. A universe branches further whenever quantum
entanglement takes place
2. As we say in our cat experiment above, the moment we open the box we get entangled with everything inside the box
3. If you found the cat dead, another universe is
created, where another version of you found the cat alive
4. This way we can imagine that another universe is
formed the moment a particle interacts with any other particle
How to travel to a parallel universe
· We currently have no technology to do so
· but, this travel is possible theoretically by a
wormhole
Here’s how
1. A wormhole is like a bridge connecting 2 points
in space which can be actually very far apart
2. A wormhole is basically a shortcut through space
3. It can be visualized using a sheet of paper with
2 dots on it
4. The smallest possible path to reach from one dot
to the other is along a straight line
5. We can find an even shorter path bending the
paper, with one dot right over the other
6. This shortest path is a wormhole in paper
7. Wormholes not only take us to another part in
this universe us, but also in parts of other universes or even back in time
Problems with this method-
1. The biggest problem with this method of travel
is that, wormholes are still mathematical
2. even if they exist they may be very unstable and
as tiny as atoms
3. They may disappear in fractions of seconds
Solving this problem-
To solve this problem,
theoretically, we can take the help of exotic matter (read a basic article on exotic matter)
1. Exotic matter is a special type of matter with
antigravity properties
2. If it is placed inside a wormhole, it will push
out the walls of the wormhole, and prevent it from closing.
All this may seem very
easy before knowing, that exotic matter is also largely theoretical, although
some initial success has been achieved in creating exotic matter
Conclusion-
I discussed a lot of
things to give you a good idea of parallel
universe
Do you think that a parallel universe exists?
And if so, will we ever
be able to travel to one
I want to know your
thoughts, go over to the comment section and let me know
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