jreed wrote:Fred, since you didn't think you would learn anything from my suggestion about using Total, I ran your program with it. I used m=50,000 so I ended up with 100,000 trials. Here's what Total found:
In[35]:= Total[Abs[A]]
Out[35]= 62334 + 37666 Abs["no result"]
Total sums all the absolute value of all elements of A. What this shows is that about 62% of the trials are used, and 37% are not detected. Here's your detection loophole for all to see.
John, let’s try to be consistent in terminology. I think we should use the word “trial” in a consistent the way. I like to think that each trial has a unique sequence number. Each trial has one setting “a” and one setting “b”. Fred’s innovation is to let Alice and Bob each collect *two* outcomes per trial. We can call them “channel 1” and “channel 2”. The outcome in each case (four cases per trial!) can be -1, 0, or +1. [I know of no experiment where this is done. Fred is simulating an experiment which was never ever done]
Fred creates, for each trial, two complete cases: a quadruple of Alice and Bob’s inputs and outputs; one set for channel 1 and one set for channel 2.
[I would suggest that he actually for each trial now tosses a fair coin, keeping only channel 1 or channel 2 data. That way, the number of trials and the number of cases finally used to compute correlations is the same, M. The correlations are much the same if M is large anyway.]
Anyway, Fred computes *conditional* correlations *given* that both particles are detected. Just like everyone was forced to do in the 70’s, 80’s and 90’s of the last century. Nowadays we no longer have to do that: we can arrange that there are no “0”s.
If I denote Fred’s outcomes by x and y, both in {-1, 0, +1}, he computes the sum of the products divided by the number of products not equal to zero. That equals the average of the product for pairs with no “0” outcome.
Fred and Joy like to say that the particle pairs where a zero turns up never actually existed. I would imagine that they did exist but one or the other was not detected. Those are two interpretations. They don’t change the maths. Those pairs were created in the computer. Fred chooses to discard them. Mathematically, it’s just the good old detection loophole. It’s pretty easy to fake the quantum correlations by a local realistic mechanism with such a low detection rate, as has been known for 50 years.
By the way, if you compute the total number of output pairs with x times y not equal to zero, for each setting pair a,b, you’ll see that this number depends strongly on (a, b). In fact it depends on a-b. That’s very unphysical! Every experimentalist who got data like this would completely re-build their experiment. How can the production of complete particle pairs depend on the difference between the settings?