There's a concept exist in Quantum Mechanics that really fascinates me the most, the Retro-Causality, which states, the future can affect the past, as past affects the future, as all of these past, present and future, influences each other at the same time.
This is because all of us are Informationally Entangled to the future, as the future is also informationallyentangled in the past.
To collapse the wave function, we need to be informationally Entangled with the universe. But how? This is possible with retro-causality.
Does this mean everything is just waves?
NO, because the matter is made of particles. Waves can become particles when it is entangled with the universe. On the other hand, almost everything in this universe is entangled with each other.
What do you mean by entanglement?
The entanglement that I'm talking about is about information. If the particle is informationally isolated, which means we cannot get any measurements of the said particle, it is NOT entangled. Which means we know nothing about it, unless all the possible outcomes of it.
But when the opposite happens, where the particle is NOT informationally isolated, this is where classical mechanics comes in. This is because we can now get information from the said particle because it is entangled with our instruments and measurements. We can now predict it's trajectory, motion, etc. because it is entangled to us.
The interesting part is, when two particles are ENTANGLED but both are informationally isolated, those particles will act as if they are like waves just waiting to be collapsed. Same is also with this universe, even though we all are entangled, we are still waves in a wave function waiting to be collapsed.
Waves can be represented in pure mathematics. Which means you are a product of rules in which mathematics abide. Mathematics follows a strict rules of logic, 1 + 1 = 2 it was never equal to 5. You can add two waves together, subtract, multiply or divide and you can get almost any representation of all particles in the universe using these waves.
What are waves?
The waves that I'm using here is a mathematical concept, since this part is now talking about mathematics. A simple wave can be represented as Sine Waves, you can add waves to form complex waves.