[doc1019]

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[RitchieAprile]

"it is impossible to say"

[SpaceBar]

Given that Dr. Susskind’s online Stanford University lectures on quantum entanglement spans nine lectures, each about an hour and forty minutes per pop, I don't think the veracity of Bell's theorem or entanglement can be easily critiqued or refuted in a pithy FR post.

[Paladin2]

Well, the NYT’s entanglement with the commie wing of the ‘Rat Party Party is a stellar example.

[Dallas59]

Does it catch mice?

[UCANSEE2]

Does quantum entanglement occur in the world?

I'm pretty sure that's what WOODSTOCK looked like.

[UCANSEE2]

” Tickle one particle here, by measuring one of its properties — its position, momentum or “spin” “

How accurate can that measurement be, considering it was only recently that we have even been able to ‘see’ electrons?

[bakeneko]

Is Dem-Fascist-Marxist-FabianSocialist-JimJonesPeoplesTemple Etanglement Real?

[onedoug]

I once met John Bell and Julian Schwinger at a conference at UCLA in honor of the latter’s 80th Birthday. Both seemed very nice men and I was honored that they would even engage with a layman so convivially.

[UCANSEE2]

If this were to be true, it would mean that we can manipulate matter across the entire Universe.

[Moonman62]

Albert Einstein sneered that if the equations of quantum theory predicted such nonsense, so much the worse for quantum theory. “Spooky actions at a distance,” he huffed to a colleague in 1948.

Einstein was one of the founders of quantum theory yet he wasn't the only founder to have major problems with it.

[steve86]

Pretty good article but ended way too soon.

The “setting independence” thing is almost as fascinating as entanglement itself.

[ForYourChildren]

In trying to remove the observer choice from the system, did they take into account the gravitational lens affect on entanglement and our observer choice to use very old photons - ha!

[Company Man]

In order to know what’s going on with the remote particle, you have to observe it. And we know what that does, observation on its own causes ‘perturbations’. So I don’t think we’ll ever have solid proof of entanglement, because observation gets in the way, as it always does in Quantum Physics. Kinda think it was designed that way, myself.

[UCANSEE2]

How do they know the other electron ‘changed’ without measuring it, and disturbing it’s original state ?

[jcon40]

years ago I read about research testing lymphocytes with an E.E.G. where some were separated from the host. Then the host was stimulated with bacteria and the separated lymphocytes that were located elsewhere reacted simultaneously with the ones in the host.

Cant remember where this was done or what the reading source was but would sure appreciate any FR help on locating the info.

[TBP]

Yes, it’s been tested. It’s real, and it tends to support spiritual belief.

[Vendome]

Quantum Entanglement=Obama

Theory proved...

[FredZarguna]

The key word is “instantaneously.” The entangled particles could be separated across the galaxy, and somehow, according to quantum theory, measurements on one particle should affect the behavior of the far-off twin faster than light could have traveled between them.

This is where lay people -- and some great physicists -- fail in their conceptualization. There is no "instantaneous."

The closest we could come is a proof that the wave function of one particle collapses simultaneously with the measurement on the other. Simultaneity in Minkowski space is well defined. "Instantaneous" means nothing at all.

No one [except people making conceptual errors] has ever claimed that the collapse of the wave functions of entangled particles satisfy a spacelike connection. However, there is no experiment one could devise that would prove the spacelike connection existed. This is because all of the entanglement experiments designed to test causality violations are measuring quantities which have no measurement along any space-time dimension. The easiest to see is intrinsic spin. The basis vectors in Hilbert space for "spin" don't have any space or time components. They don't project onto spacetime axes at all. This is why the no communication theorem applies.

People find the invocation of nonlocality [which is not the same thing as simultaneity] astonishing and weird -- except when they overlook it, which is most of the time; but it's already present in the classical physics of Newton and Maxwell, as well as the quantum physics of Schroedinger, Dirac and Klein-Gordon Equations -- as metaphysics.

In Newton's world, F=ma holds throughout the universe. That's about as nonlocal as you can get. And the laws of classical and quantum physics both have that kind of nonlocality or they would not be useful for getting any answers.

[Company Man]

Yeah, what he said.