re: Questions about quantum entanglement.
Quantum entanglement (wiki)
Quantum Entanglement (Stanford)
What is it?
(see above links)
Well, it's basically the discovery that two particles can influence each the other, regardless of distance.
How is it achieved?
It's actually a natural process that is in the process of being identified and understood. When two atoms are placed in proximity and then separated again, the entanglement has apparently commenced.
Researchers basically measure entanglement based upon how often the particle violates Bell's inequality.
The tests for observing this violation are somewhat complex, but have involved experiments with pairs of photons emitted from excited atoms, filtered through polarizers and measured by photodetectors for "coincidences," which are time-specific and orientation specific observations. The more times they violate Bell's inequality, the more evidence we have for entanglement.
What materials can be entangled?
Theoretically, all atoms can be (or actually are) entangled to some degree, but the it is much easier to observe entanglements in atoms with similar weights and properties. Right now the observations have been limited to atomic particles.
Can matter and energy be entangled?
Actually it is energy, in the form of particle quanta, which are being entangled. So the answer is yes.
Can the process be undone (i.e. untangled)?
Theoretically, yes. But we don't understand the process well enough to introduce specific changes. By moving the particle to a new environment, it is possible new entanglement and quantum interfacing is already happening without any direct manipulation.
There is much unknown about the action at a distance demonstrated by quantum entanglement. The Atomic Vortex Theorem gives a new perspective on quantum entanglement, because it illustrates that particles of any given atom share and communicate information at another level. This will require an illustration to explain:

How does timespace become unified? Well it is both unified and disjointed simultaneously - when a signal is sub-lightspeed timespace is disparate and atoma and atomb are separated by the various properties of time space: Time, length, height & width. When a signal exceeds lightspeed, timespace becomes unified. Because the signal has now reached the fundamental "ground state" of timespace itself and can travel anywhere and everywhere through timespace at once.
Quantum entanglement, is simply more evidence that such a unification of timespace must surely exist and which is sharing signal data across the vast universe instantaneously. Unified timespace becomes a "fifth" dimension. And only super high energy, super high frequency energy exists within it.
Such a concept provides all sorts of possibilities, traveling FTL, extracting data from another corner of the universe locally, the applications are limitless.
That's probably more than you wanted to know, but I endeavor to paint a fuller picture of the topic.
