Thursday, 14 March 2019
quote [ Researchers from the Russia teamed up with colleagues from the US and Switzerland and returned the state of a quantum computer a fraction of a second into the past. They also calculated the probability that an electron in empty interstellar space will spontaneously travel back into its recent past. ]
No, they didn't turn back time like Cher wishes she could, but it's still pretty neat what they did.
Here's an explanation I found:
This reversal was not performed in a closed system, but was instead driven by a specific device. The second law of thermodynamics still holds in general for closed systems. The flow of time was not ever actually reversed in this system, however a quantum states evolution was successfully reversed. Its cool and useful, but it's not time travel.
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