Epr Definition and 123 Threads

I don't see why the EPR thought experiment would ever be concieved as a way to demonstrate anything against QM... (you can find an explanation of the EPR thought experiment here: http://en.wikipedia.org/wiki/EPR_paradox) Ok before Alice measures anything P(+z)=0.5 and P(+x)=0.5 for both...

The Stanford Encyclopedia of Philosophy seems to say it dosn't. I took this quote from there website http://plato.stanford.edu/entries/qt-epr/ "Whatever their precursors, the ideas that found their way into EPR were worked out in a series of meetings with Einstein and his two...

- 1) The origin: Conservation laws → Correlation It’s the laws of conservation of energy, momentum, angular momentum, that necessitates a correlation between the outcome of separated random quantum processes. Specifically, the random process which is known under various names as the...

something is not quite clear to me, when going over the EPR paradox. EPR said that both the measurement of the momenta and the measurement of the x-coordinate of the state are related to the same reallity? why is that true? the way i see it, if you can't measure two physical quantities...

I have a question about quantum entanglement experiments, such as the two-photon "delayed choice" experiment performed by Aspect et al. http://prola.aps.org/abstract/PRL/v49/i25/p1804_1 . Can anyone estimate how much time elapses between the arrival of a single photon at the detector, and the...

Hi, I have a question: The EPR experiment told us the world is nonlocal. And as we know, the QFT is a local theory, there is a principle that measurement do not affect each other between spacelike points. Do the two conflict? And can we say "we can not find an experiment for now which does not...

Hi can somebody here please give me some links or info on recent experiments (last 10 years) conducted to on the EPR paradox, for example i know of aspin's experiment, any others?

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[I invite people to post links as responses in case the idea I'm putting forward is already covered someplace that I missed.] Something has been bothering me about this type of experiment for a long time, but this is clearly the place to bring it up. My problem is this: that in an...

After a lookback at the current flap on EPR's validity I found that the Aspect Quantum Chemistry seemed to be invalid in that the modeling involved Calcium's configurational electrons. The model assumes that there are a pair of valence (4s) electrons and a pair of 4p electrons?? There are only...

. The entanglement case and the fully deterministic case produce identical results (yes): The entanglement dictates 100% correlation at equal detector angles (a-b=0) as a result of the cos2 Malus law. In multi photon GHZ type experiments, with 3, 4 or more entangled photons...

We have one big advantage over what Bohr and Einstein had in the 1935 EPR debate. We can actually perform the experiment. Let's see what Nature decides. The Einstein point of view is that when the two photons are created, they both have a definite polarization that is negatively correlated...

In the Oct 1992 issue of Scientific American, the article "Quantum Cryptography", by Charles Bennet, Gilles Brassard and Artur Ekert mainlines experimental work on a very powerful cryptosystem that has been devised that is essentially impossible under QM rules: "The EPR effect occurs when...

I have some questions about other possible tests of the EPR Paradox. The base of the paradox is using one entangled particle to gain information about the other. The usual setup discussed involves spin, often photon spin. But what about other measurable attributes of a particle? If we take...

So silly question! but how does EPR and entanglement theory are related? I mean the history and its cocepts of similarities. Thanks in advance. Somy :smile:

Consider the usual set up in regard to showing that quantum correlations exist. Recall how Einstein, Podolski and Rosen in there 1935 argued that quantum mechanics must be incomplete since we can tell immediately the state of a particle A at time t by measuring the state of a particle B it...

In LQG the minimum time is 10^-43 seconds. So how can there be instantaneous action at a distance in LQG between entangled photon pairs? Also, a particle traveling through quantized space would jump from one position to the next and miss some space in between.The standard quantum mechanical...

Assuming that I have an atom that produces two photons having opposite polarization, and I send one toward the event horizon of a black hole and the other is sent to a second observer who does not measure his photon's polarization until enough time has passed to insure that the other photon has...

If I was inside a Faraday cage,a long way from a any gravitational sources such as stars and planets,and the cage had negative electric charges all over its outer surface,kept in place by a strong sheet of glass,and somebody suddenly placed a large aggregation of positive charges nearby...

We (three students from the Netherlands) are working on a project on Bell's inequalities. We have studied the original EPR-paper from 1935, which states that quantum mechanics may well be an incomplete theory. Reactions on this paper. Von Neumann's completeness theorem. The Kochen Specker...

I would like your comments on whether a model of EPR entanglement based on superstring theory makes any sense. Let's suppose we are concerned with understanding the entanglement of an electron/positron particle pair created at a point in an EPR experiment. The particles fly off in opposite...

***EPR Experiment with Pool Balls*** First of all sorry if what I am going to ask seems crazy stupid, but it is an idea that rounds my mind since I started reading about EPR subject. As far as I've read, you can imagine EPR with photon polarization or with particle spin. So, I have imagined...

The basic idea. The proposals of this paper are based on a combination of a Holistic and Quantum Mechanistic “Dual Anti-Mirror Symmetrical” worldview by postulating: 1: That there was no “broken symmetry” in the Big Bang Process and as a result, our universe is “non local” correlated...