[pointless argument] Why are teleporters impossible

[quantum1423]

I was thinking of a kind of teleporter common in science fiction: the door that when you enter, you pop out somewhere else. This kind of teleporter violates the first law of thermodynamics!

Energy cannot be destroyed or created. If we put two teleporting doors like this:

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and arrange them so that a ball falling through the lower teleporter will go back up and continue to fall, the ball will fall faster and faster without bound, violating the 1st Law.

Another violation of the 1st Law:
If we put two doors like this between vertical walls:

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and drop the top door down, the air in between the doors will be compressed. As there is no conceivable way the air can do work on the teleporters, eventually the pressure will approach infinity, an act obviously requiring more than the gravitational potential energy of the top door.

P.S. if anyone knows about it violating some other law, please reply to this post!

 

[K^2]

Additional energy comes from teleporter itself. The details depend on the kind of teleportation you are talking about. In UC teleportation, the energy difference is accounted by having stock material start out at higher potential. In quantum teleportation something similar happens with the system that receives teleported state. With wormholes, there is going to be a gravitational field within the wormhole itself that has to be opposed by something in order for you to get across in the first place.

There are a lot of problems with teleportation, but none of them are fundamentally unsolvable. Keep in mind that quantum teleportation has been performed experimentally already, and rapid prototyping devices can be viewed as rudimentary UCs.

 

[quantum1423]

In fact, I believe that after teleporters are invented, the First Law can be restated as:
There cannot be a workless teleporter.

 

[Vanadium 50]

This is overly speculative. It's certainly not classical physics - or even physics.