Quantum decision affects results of measurements taken earlier in time

[zoowar]

http://arstechnica.com/science/news/2012/04/decision-to-entangle-effects-results-of-measurements-taken-beforehand.ars

[DennisP]

Paper on arxiv (pdf): http://arxiv.org/ftp/arxiv/papers/1203/1203.4834.pdf

[JoeAltmaier]

On the face of it, sounds ridiculous. E.g. use the correlation of Alice and Bob to select whether to entangle the paired photons - then what?

[MPSimmons → JoeAltmaier]

You can look at it like "the measurement of the original photon determines whether or not the pair is entangled", if it makes you feel more comfortable, but that's kind of reversing cause and effect.

[MPSimmons]

I guess I don't understand why this is counter-intuitive if you accept quantum entanglement. Reading a quantum state collapses the wave function. Cause and effect.

Time is just another direction.