It do feels vagueish at first but I just wanted to make them feel what is matter best without adding more words...

There's no thing like there are only some states if matter,

Its just how the matter behaves.

In our human world we can observe 3 states of matter.

Bose einstein condensate is the group of bosons at 0 temperature of universe.

So we can only observe it with special observation things.

For 0 temperature of universe the group of bosons has to be cooled in a very special apparatus.

So we can't observe it directly or even touch it.

Because if we even want touch it our hand will also get into different state of matter even close to it, and our nerves and every sensory biological things will stop working.

A quasi particle is a temporary particle which is not found like fundamental particles like protons, electrons etc.

But it forms due to interactions between them, because of forces, it is also called as an exciton.

There are phonons particles of sound, magnons particles of magnetic fields..

A Bose Einstein condensate is a state of matter

A state of matter is how a bunch of matter is.

All the particles we have found are of 2 types

Fermion and bosons.

Fermions are like individual balls,

If you keep packing them and squizing a bunch of them, they will not merge in themselves.

Bosons are like bunch of energy balls, they can merge.

When you take energy from the bunch of particles, they come more close.

A bose einstein condensate is a cooled bunch of bosons.

When you take energy from bosons they first behave like bunch of balls,

But when you cool it more

They behave like waves,

( Because quantum (smaller beyond human world) particles can also behave like waves)

And the waves start to collapse,

And at the 0 temperature of universe

All waves collapse at this low energy.

The energy balls attain the stable energy state available

And this is the bose Einstein condensate.

Quasi particles also form bose Einstein condensate.