I am interested in how physicists view time, and in any thought experiment (eg. anti-matters time direction, spinning black holes that may have the time dimension no longer orthogonal to the three special directions, delayed quantum eraser experiment that might permit backwards in time...
Same number of photons yes. But the emergent distribution of where the photons at D0 strike a screen will if it cannot be determined which slit these photons passed through be to produce a diffraction pattern at D0, while to not produce this diffraction pattern if the red and blue paths differ...
Thanks Dr Chinese. I will read the paper with interest. But my understanding (perhaps wrong) of the Delayed Choice Quantum Eraser experiment is that the coincidence counter is used to divide into two inputs at D0 those entangled photons whose twin arrives at D3 or D4, from those that arrive at...
http://en.wikipedia.org/wiki/Delayed_choice_quantum_eraser
http://en.wikipedia.org/wiki/File:Kim_EtAl_Quantum_Eraser.svg
The mirrors I am going to have mechanically raised or lowered under a computers control, itself doing so only in the pauses between transmission of entangled photons are BSa...
A simple question I have never got a reply to from any quantum physicist I have ever asked. Take the standard delayed choice quantum eraser experiment. Send entangled photons in a stream through it. Interrupt the stream with pauses in transmission at regular intervals for synchronisation...