Is the Portal Gun (and Quantum Space Holes) physically possible?

[saucecode]

So I was watching the Portal 2 investment opourtunities trailer today, and i got to thinking, ??

From what i've seen, when someone enters a portal and comes out the other side, their volume stays the same. So if you threw a block of X cubic meters through a portal, it will always occupy X cubic meters whilst travelling through. The whole maintaining of momentum thing seems right too. Maybe im wrong.

Either way, whats stopping humanity from creating the greatest christmas present in the world?

 

[HiReception]

Probably the same thing that derailed Waldenclyffe Tower: Money.

Remember, a Portal gun wouldn't just be used in an Aperture Science Test Chamber; with the right precision and planning, you could use it to access forbidden areas, like an aeroplane cockpit, Fort Knox, or even the Staples Center without buying a ticket (!), plus you'd need to determine which surfaces respond to Portals and which don't...

 

[Itsthatguy]

The whole maintaining of momentum thing seems right too.

Thats the thing though. Momentum is not conserved, because momentum, "a function of mass and velocity", has a direction, like velocity does. Portals change the direction in which things move, thus they change the momentum.

 

[Tortilla the Hun]

I'm sure someone has a much more scientific answer, but I assume it would be extremely difficult to actually make a portal. Of course there might also be limitations of what surfaces could actually hold a portal, and the size of the portal would be a major factor to consider. I think more time is needed. More time, and more testing.

 

[Jesse Chu]

It's not possible, the location of an object defines its potential energy. Basically, a portal on the floor of a room and on the ceiling of a room would cause the relocation of the object to a different spatial coordinate, CREATING potential energy, which violates conservation.

This COULD be offset if the gun itself was able to provide the energy required for the relocation of an object, and you could argue the "Miniature Black Hole" in the specs of the portal gun could do this.

If you're truly interested in the subject, look up "Vacuum Boiling" and "Phantom Particles", it's an area of quantum physics that could relate to this.