How does "spooky action at a distance" work in Quantum Theory?

Question

Is there a theory for how the information about a changed state gets transmitted "instantaneously" from one particle to another?

Answer 1

Look up "Bell's theorem".

Answer 2

"...according to quantum mechanics, an experimenter could entangle a pair of particles, separate them by vast distances, then instantaneously change the state of one by changing the state of the other - even at distances of millions of light years.

This "spooky action at a distance," according to Albert Einstein and two colleagues, was a direct result of quantum mechanics if it failed to have more-classical underpinnings. It so defied common sense that they refused to accept quantum mechanics as a complete explanation for how physics really worked at the level of the very small.

The debate remained in the realm of "thought experiments" until 1964, when Irish physicist John Bell, working at the European Center for High Energy Physics in Geneva, described a way to test the idea.

Moreover, he concluded that if one followed the details of Einstein's argument to their logical conclusion, quantum mechanics was more than incomplete, it was wrong. This triggered an initial wave of experiments that demonstrated entanglement in the 1970s and '80s.

In 1997, a team at the University of Geneva conducted a particularly dramatic demonstration by entangling packets of light called photons, then sending them in opposite directions down fiber-optic lines to detectors nearly seven miles away.

When they measured properties of one photon, it had an instantaneous effect on the other. If the interaction behaved in a classical way, a measurable amount of time would have passed between measurement of one and the effect on the other."

Answer 3

not yet
Allan W Janssen

Answer 4

your talking about black holes and what not.
quantom mechanics is awsome.
yet id never understand it