News for hackers. Stuff that matters.

A comment on You thought quantum mechanics was weird: check out entangled time. Parent comment

Re:You thought quantum mechanics was weird: check out entang... by solipsism on Sunday February 04, 2018 @11:46PM (#16306663)
You didn't read it correctly. They measure photon 1 before photon 3 or 4 even exist.
[ Parent | on HN ]
Re:You thought quantum mechanics was weird: check out entang... by resource0x on Sunday February 04, 2018 @11:58PM (#16306697)
They measured photon 1 because they wanted to prove correlation (it would be impossible to do without measuring it). If you believe they proved it, it works both ways. Hadn't they measured photon 1, our measurement of photon 4 would determine polarization of photon 1 a billion years ago. Entanglement works both ways, according to the theory.
[ Parent | on HN ]
Re:You thought quantum mechanics was weird: check out entang... by boyce on Monday February 05, 2018 @03:54AM (#16307537)
Not just in theory! Isn't this what Alain Aspect tested?
[ Parent | on HN ]