Before you read any further, I wanted to set some parameters for the thread.
I'm going to be posting up a study from mid-April. I haven't had the chance to go through the methodology myself, yet. Ideally, others in here who are well-versed in Quantum physics will contribute. What that means is, if you don't understand the topic, and can't understand the physics being discussed here, please just read, or ask for clarification. Please do not post opinions based on what you've heard, or your personal beliefs.
Please, please, please, no pseudoscientists in here.
As I study this experiment, I'll be posting up my breakdown of the methodology, any potentially omitted conclusions from the data, and basically... a critique of the study. It will probably take a week or two, based on my schedule.Motivated by the question of which kind of physical interactions and processes are needed for the production of quantum entanglement, Peres has put forward the radical idea of delayed-choice entanglement swapping. There, entanglement can be ‘produced a posteriori, after the entangled particles have been measured and may no longer exist’. Here, we report the realization of Peres’s gedanken experiment. Using four photons, we can actively delay the choice of measurement—implemented through a high-speed tunable bipartite-state analyser and a quantum random-number generator—on two of the photons into the time-like future of the registration of the other two photons. 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’.
For the physicists in here, enjoy! For those who aren't physicists, feel free to ask questions of the physicists. We'll try to make it clear what was going on in the study.
Extraordinary claims, require extraordinary evidence. I'm going into this analysis looking for their flaw(s). I encourage the others to, as well.