by Gordon Watson » Mon Sep 07, 2015 7:11 pm
FrediFizzx wrote:Gordon Watson wrote:Fred, this sentence has me confused: "And this is like it would be in a typical experiment; they can never get those vectors to be perfectly in the same 2D plane."
Could you elaborate please: What is the niggle that arises, in the model and in practice, with respect to the two detector settings; a (set by Alice) and b (set by Bob)?
Hi Gordon,
In a typical EPRB experiment with photons, I doubt very much that they could get the polarizers for A and B detection aligned perfectly perpendicular to the axis of propagation. Sorry, they aren't actually in the same plane so my terminology there wasn't good but hopefully most people would understand what I mean.
We have found via doing these simulations with GAViewer that the perfect correlation happens if the
a and
b vectors are perfectly aligned perpendicular to the propagation axis. Which is a good thing because it is definitely easier to work with them being 2D instead of 3D.
Thanks Fred,
That was not what I expected, me certainly hoping that the model would be more robust: and me now wondering why it is (apparently) not. That is:
Given EPRB as per the topic heading (and with its spin-half particles or with the photonic variant),
the state is spherically-symmetric.
So the detector settings
a and
b can be widely varied over 3-space and certainly
neither need be anywhere near orthogonal to the line of flight: yet (under all variants) the Expectation remains as E(
a,
b) = cos 2
s (π ± (
a,
b)) where
s denotes the relevant intrinsic spin and (
a,
b) denotes the angle between the detector settings.
I'd welcome your comment; me now wondering about the strength of the model being used and/or the versatility of the
GA Viewer?
Specifically, I'm presuming that Joy's model does not require that orthogonality?
With my thanks again; Gordon
...
[quote="FrediFizzx"][quote="Gordon Watson"]Fred, this sentence has me confused: "[u]And this is like it would be in a typical experiment; they can never get those vectors to be perfectly in the same 2D plane[/u]."
Could you elaborate please: What is the niggle that arises, in the model and in practice, with respect to the two detector settings; [b]a[/b] (set by Alice) and [b]b[/b] (set by Bob)?[/quote]
Hi Gordon,
In a typical EPRB experiment with photons, I doubt very much that they could get the polarizers for A and B detection aligned perfectly perpendicular to the axis of propagation. Sorry, they aren't actually in the same plane so my terminology there wasn't good but hopefully most people would understand what I mean.
We have found via doing these simulations with GAViewer that the perfect correlation happens if the [b]a[/b] and [b]b[/b] vectors are perfectly aligned perpendicular to the propagation axis. Which is a good thing because it is definitely easier to work with them being 2D instead of 3D.[/quote]
Thanks Fred,
That was not what I expected, me certainly hoping that the model would be more robust: and me now wondering why it is (apparently) not. That is:
Given EPRB as per the topic heading (and with its spin-half particles or with the photonic variant), [b]the state is spherically-symmetric[/b].
So the detector settings [b]a[/b] and [b]b[/b] can be widely varied over 3-space and certainly [u]neither[/u] need be anywhere near orthogonal to the line of flight: yet (under all variants) the Expectation remains as E([b]a[/b], [b]b[/b]) = cos 2[i]s[/i] (π ± ([b]a[/b],[b]b[/b])) where [i]s[/i] denotes the relevant intrinsic spin and ([b]a[/b],[b]b[/b]) denotes the angle between the detector settings.
I'd welcome your comment; me now wondering about the strength of the model being used and/or the versatility of the [b]GA[/b] Viewer?
Specifically, I'm presuming that Joy's model does not require that orthogonality?
With my thanks again; Gordon
...