Multiverse- Your New Address

It does not depend on where your progress lies. The farther you try to look outside our endless universe even with great technological innovations, till eternity, you will never succeed. All the laws of physics restrict us to see beyond our observable universe. No one will ever know what's behind the scenes of our universe. But, let’s try. Let's look beyond our limitations, keeping aside all the laws for a while.

If you are a science freak, you must have wondered on a frequent question. Are we alone in this cosmos? Or maybe, Is this the only cosmos? This is now humanity's No.1 question. “The multiverse”. We’ll answer it today with a stroke of fiction.

Multiverse has always been a contagious issue for debates. The idea of multiverse offers us a big tight spot because we can't practically prove it. The multiverse is the idea that our home universe - that looks unimaginable never-ending, is a part of a big family. This universe may or may not be connected to each other. We'll never know. But what we can know is the existence of the multiverse. We can make it theoretically achievable.

Being so tiny in our own universe, how can we detect multiverse? The universe is expanding with speed beyond light. Speed faster than light? Well, yes that's possible. Possible for our Universe but not for stuff inside it.

The observable universe is about 50 billion light-years long, taking into account that we are the centre of everything in the universe. But, there is more space inaccessible. So, to solve the idea of the multiverse we will get into the two different points but all together theories.

One, unimaginably big at the cosmic level - The Eternal Inflation. And another, an unimaginably small at the atomic level - The Quantum Theory Of Uncertainty.

Roughly over 13.8 billion years ago, all matter was compacted into a very small ball with infinite density and intense gravitational pull – The singularity. It is believed there was no space and time. Everything was silent and dead. And then something occurred because of which an explosion amazingly capable enough to create our universe, took place. The universe got shaped and started expanding.

Just like you inflate a balloon. But this time, you filled a lot of air inside it. The balloon did not burst and inflated for perpetuity. Between 0 to approx 10^-4 second at the plank scale after Big Bang, Inflationary Epoch took place. In this epoch, the universe stretched out exponentially. The heat was about 10²⁷ Kelvin. And then slowly, the universe started pulling down.

As the temperature decreased, the energy of the subatomic particle (created at the time of inflationary epoch), also decreased and the fundamental forces change them into macro-forms. Everything started cooling down. The thing didn’t stop was inflation.

It was not till mid-1900, We, humans came up with the idea of an expanding universe. When Edwin Hubble, discovered that distant Galaxies were going far from each other it gave up the theory of cosmos inflation.

The freshest estimation for the inflation theory takes M-theory as its base and proposed that our universe is just one in a family of the multiverse that is connected by higher dimensions. Take any two of them. This two universe will not know each other unless they happen to collide, which creates an equivalence to Big Bang. This theory is known as The Ekpyrotic Theory. It is a cosmological model of the early universe that explains the origin of the large-scale structure of the cosmos. The model has also been integrated into the cyclic universe theory, which proposes a complete cosmological history, both the past and future.

Now, there is a physical limit to how hot the big bang could have reached. If the temperature was so damn high then there would be evidence that there aren’t any temperature changes. The fact that these proofs are not present provides us with a big result - the universe never reached an illogically high temperature. Something came before the hot Big Bang.

And here, the Inflation The theory comes into play. We have much close evidence that supports time in the early universe when inflation started. Only inflation, as we know, gives us the predictions for own Universe that matches with whatever we observe.

But still, we didn't get answers on the multiverse. Our second step is quantum mechanics. Till now we have seen inflation as a never-ending field. We will combine this idea with a principle of UNCERTAINTY from Quantum Field Theory.

In Quantum Mechanics, uncertainty tells that the position and the velocity of a particle cannot be measured at a particular time. So, as time goes on, even for a particle, its position will spread out exponentially over time.

If that's true, the inflation field energy will convert itself to matter and another form of energies. As the universe will expand, the value of the field will also change slowly and this will be different in different regions. Here, the quantum nature of inflation means that as there are different values of the inflation field in different parts; there will be some parts where expansion stops and others where it doesn't.

Places where inflation stops right away, we get a Big Bang. This will create a new universe. So inside a single loop, constantly new The universe is being created. This is Multiverse. Inflation never ends. This is how things should flow.

Where the Infinite nature of the universe ends, new infinite Universe starts. Well said, part of the journey is the end. Till date, this is just a hypothesis that looks perfect... Turn around, observe, and think again. If everything goes well my friend - Boom, you have solved the toughest question for our civilization. Multiverse exists and that’s your new address.