回复：考考诸位， Can Quantum Eraser erase the past?

Quantum Eraser is very misleading and poorly interpreted by those puzzled physists.

I always have an open wind on retrocausality. But Quantum Eraser experiment does NOT provide any evidence of it.

That wrong conclusion was drawn by some poor physists who lacked solid background on quantum machanism.

From quantum machanism point of view, you must not think of the two entangled particles and wholly separate enties. They are, in essence, one particle. For each photon split through the crystal, try to think of the split particles as one. Then quantum machanism can explain the whole experiment very well.

Why people got confused? They are applying a classical view on those entangled particles, and unobserved probability waves (in their view they are "split"). Entangled photons do not take on a classical form and do not follow classical rules.

In a word, you simply CAN NOT draw your conclustion that the world is retrocausal; because you are applying a classical view on entangled photons.