Internet
that we see today is much more evolved and matured than its old counterpart
ARPANET, but it still lags in terms of data security and connectivity. For the
existing network, the main bottleneck is the communication channel which is slow
and insecure. Is there any chance of communicating
with one another through space without using any medium? This may sound like science-fiction but in
near future this seems possible.
The world that we see through our eyes is far
more different from the microscopic world of particles where behaviour of
nature is really out of our imagination. At these levels classical laws of
science do not hold anymore, we have quirky quantum laws to govern these tiny
particles.
One of the strangest and counter-intuitive phenomenons in quantum world is
quantum entanglement. Its weirdness can be seen through this unexplainable
behaviour. Take a photon (light particle) and divide it into two photons and by
nature these photons happen to have opposite polarity. But now separate these two
photons far away each other (even miles) and if you try to change polarity of
one of the photons, what you happen to see is a bizarre thing. The other photon
which is far away will reverse its polarity..! Till now none could figure out how this thing could
happen. These photons are said to be
entangled and by some means these photon communicate to its entangled pair to change
its state whenever its own state is changed.
By using this strange
property we could achieve Quantum teleportation through which we can teleport
information across the space. The heart of it is the entangled pair which must
be shared by sender and receiver and after devising a protocol they could start
transferring information securely.This idea could pave way for a
quantum internet which is totally secure and it practically allows no way for eavesdropper to peek into network.
P.S:
I tried to simplify certain things down here and I didn't go deep into subject but actually some of the processes mentioned above needs mathematical touch. I will be more elaborate in the later posts.
