TimeNot_0
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http://www.nature.com/nphys/journal/vaop/ncurrent/full/nphys2294.html
This effectively projects the two already registered photons onto one of two mutually exclusive quantum states in which the photons are either entangled (quantum correlations) or separable (classical correlations). This can also be viewed as ‘quantum steering into the past’.
also:
In New Quantum Experiment, Effect Happens Before Cause | Popular Science
?? What does it all mean ??
This effectively projects the two already registered photons onto one of two mutually exclusive quantum states in which the photons are either entangled (quantum correlations) or separable (classical correlations). This can also be viewed as ‘quantum steering into the past’.
also:
In New Quantum Experiment, Effect Happens Before Cause | Popular Science
?? What does it all mean ??