Teleportation is a standard procedure in any decent quantum mechanics laboratory. Physicists use it on a daily basis for quantum communication and quantum computation.
…until now, physicists have only been able to teleport single particles, one at a time. Today, [researchers in Barcelona] say they’ve worked out how to teleport quantum stuff continuously, [allowing] them to manipulate one quantum particle while watching the effects occur in another particle elsewhere…
[Teleportation] is possible because of a strange quantum phenomenon known as entanglement, which occurs when two quantum particles are so deeply linked that they share the same existence. In mathematical terms, both particles are described by a single wave function. So any manipulation of one particle automatically influences the other instantly, regardless of the distance between them.
The trick that physicists have perfected is to arrange this interaction so that the second entangled particle ends up in the same state as the quantum particle called X. This isn’t just a very similar state, it is an identical state—no measurement could distinguish this particle from the original X. When this happens, X has been teleported.
The new technique works in a similar way. First, physicists create a pair of entangled particles. They then place one particle in a varying magnetic field to influence its state. The new trick that they’ve discovered is to arrange this experiment so that manipulation of the first particle causes the state of its entangled partner to change in the same way.
In other words, they use the magnetic field in one region of space to continuously control the state of a particle somewhere else in space. Or as Muschick and co put it: “We show how the ability to perform quantum operations continuously and deterministically can be leveraged for inducing nonlocal dynamics between two separate parties.”