Quantum teleportation !!

Quantum entanglement defines a set of particles that are somehow connected to each other that's why when we observe the state of one of them we can immediately know the state of the other.

I already described this as "spooky" that's because the information that seems to travel between these two particles is a mystery it's like telekinesis between particles and the oddest thing that is so hard to be believed is that the exchange must be instantaneous. Why's that?

Let's consider a pair of entangled particles |𝚿〉=|↑↓〉+ |↓↑〉and let say that at a certain moment I observed one of them and found that the spin is up, in this case, I know immediately that the other is down and I said immediately. The thing is I don't need to observe the other particle at that moment, observing it would apply a delay, it's conducting a new active measurement and the state of the first particle becomes unknown. 

Entanglement was one of Einstein's biggest nightmares he even called it "Spooky action at a distance" because this phenomenon seemed to work at any distance whether it's is a kilometer or even if the two particles belong two different galaxies. But this pauses serious troubles to classical mechanics and especially to the relativity concept!

If you remember in my second article when I talked about time travel, the whole Idea was that the more we approach the speed of light the slower the time goes. In addition to that, the theory insists that the speed of light is absolute and nothing can ever surpass it.

But based on the entanglement theory, the information is instantaneous, there is no delay at all, the distance can be galaxies and galaxies and in this case, the speed of light can be even negligible!!

This is known as the nonlocal effect because it doesn't seem to depend on any space and time variables and as crazy as it sounds, the possibilities that it brings are limitless and very optimistic.

Have you ever wished for being able to go to places in the blink of an eye, to enjoy your morning sleep till the last moment then in a billionth of the fraction of a second, you find yourself in the classroom, you don't need to go into the hellish traffic to reach any location. Yes, teleportation is possible!! So how does it work?

The concept is theoretically easy, however, the practice is more complex: The procedure needs a pair of entangled particles where one must be at the location of the individual or object that needs to be teleported with an associated wave function |𝚿1〉 and the other in the arrival location with a wave function|𝚿2〉. 

The next step is to we get another third particle with a wave function |𝚿t〉 that belongs to the teleported object (like an atom from my nose ), then by comparing its quantum state to the particle |𝚿1〉the data is sent to the receiving location where the quantum states are mimicked so that 

|𝚿p〉=|𝚿2〉. It's like comparing two numbers in mathematics if x>y and y>z than automatically x>z. One of the entangled particles works as a comparator that defines the differences between the quantum states and as a result, we get the object to teleport. It's not literally teleporting, neither cloning because the object is destroyed in the process.

The difficulties that encounter this technique is that it needs to copy every single particle from that object to get another identical one, knowing that the number of particles exceeds by far the number of stars in a galaxy. But that doesn't prevent the fact that scientists were able to teleport about 900 photons to outer space by the same technique which proves that teleportation is actually possible. 

 The technique caused a lot of debate because of moral and religious causes like destroying the original teleported person and pauses questions about whether the created person has the same consciousness as the original... This is not our subject, we are only here to discuss physical possibilities.

It will be cool to set teleport stations all across the galaxies or maybe parallel universes if they exist so you can meet your parallel-self. 

Honestly, quantum mechanics doesn't stop to impress me !!