twistor59 wrote:Colin Bell?

I think you might have meant John Bell!

CySlider wrote:

twistor59 wrote:
I think the function on a digtal computer is a red herring, because to construct such a function, by which I assume you mean "program", you would first have an algorithm which your program was implementing.

So also a quantum computer can't simulate entanglement? I was not sure about that and wanted to exclude these type of computers from my definition, just to be clear.

CySlider wrote:

twistor59 wrote:
There is no "spooky action at a distance". In these EPR experiments, all you observe are correlations. i.e. something explodes and sends some shit off in two directions. Measure some shit at A, whilst another dude measures some shit at B. Dude A and B then get together in the pub over a pint and discuss the data. They find things like "oh look, when I was getting x, 90% of the time you were getting y etc etc". These are correlations, and not surprising, because the system was originally "together" before it flew apart, so correlations are no big deal. (Bigger deal is the "rotating the basis" thing, but that's not what you were asking - you were concerned only about Bertlemann's socks)

Ok, so if I understand you correctly, it is perfectly fine for two people in different inertial frames to disagree about which event has lead to the collapse of a wave function?

hackenslash wrote:

twistor59 wrote:Colin Bell?

I think you might have meant John Bell!

Reminds me of the concerted campaign by Manchester United fans to have one of the stands at Eastlands named 'The Bell End'.

twistor59 wrote:Talking of fruit, you mentioned that you weren't happy with proofs of the Bell inequalities. Here's one of the best explanations I've seen that gives a flavour of what lies behind the mathematics:

http://www.physicsforums.com/showpost.php?p=1361050&postcount=3

twistor59 wrote:
Talking of fruit, you mentioned that you weren't happy with proofs of the Bell inequalities. Here's one of the best explanations I've seen that gives a flavour of what lies behind the mathematics:
http://www.physicsforums.com/showpost.php?p=1361050&postcount=3

Abstract wrote:ABSTRACT

CERN Colloquium

Bell's Theorem, discovered by him when he was working at CERN in the 1960s says that certain correlations between entangled quantum states violate an inequality, now named after him. Initially this was just seen as a conflict of a classical, local, realistic world view with quantum mechanics. But Bell's work triggered an enormous experimental and theoretical activity which provided the basis for quantum communication and quantum computation.

Today, violation of his Bell's Inequality is so standard in many laboratories world wide that it has become an important criterion for the quality of entangled states created. In the talk I will reflect on the current status and future prospects of experiments, focusing on long-distance quantum entanglement and quantum communication.

Finally I will also present a very recent experiment on quantum imaging.