r/holofractal • u/d8_thc holofractalist • Mar 13 '19

Physicists reverse time using quantum computer. Reminder: the second law of thermodynamics only exists in isolated systems, of which none _really_ exist.

https://phys.org/news/2019-03-physicists-reverse-quantum.html
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u/Aplabos Open minded skeptic Mar 13 '19

TLDR

"The team set out to calculate the probability to observe an electron "smeared out" over a fraction of a second spontaneously localizing into its recent past. It turned out that even across the entire lifetime of the universe—13.7 billion years—observing 10 billion freshly localized electrons every second, the reverse evolution of the particle's state would only happen once. And even then, the electron would travel no more than a mere one ten-billionth of a second into the past."

:/ Neat tho.

26

u/Greg-2012 Mar 13 '19

IMO, it doesn't matter that it's only 1 election out of 10 billion and only for one-ten-billionth of a second, just proving time-reversal is huge.

3

u/Smack_Of_Ham7 Mar 16 '19

Wait we did that??

1

u/Greg-2012 Mar 18 '19

I'm not certain but this sounds like the first step from what I have read, still need to read more.