Anonymous ID: 504f0a June 20, 2018, 11:56 p.m. No.1843655   šŸ—„ļø.is šŸ”—kun   >>3716

Time machines ā€¦ influencing the future ā€¦ future proves past ā€¦ Tesla/Einstein/military computing ā€¦ the possibilities ā€¦ way too late ā€¦ time for bed

 

Excerpts from:

https://aeon.co/ideas/you-thought-quantum-mechanics-was-weird-check-out-entangled-time

 

You thought quantum mechanics was weird: check out entangled time

 

ā€¦ in a 1935 paper, Einstein and his co-authors showed how entanglement leads to whatā€™s now called quantum nonlocality, the eerie link that appears to exist between entangled particles. If two quantum systems meet and then separate, even across a distance of thousands of lightyears, it becomes impossible to measure the features of one system (such as its position, momentum and polarity) without instantly steering the other into a corresponding state.

 

Up to today, most experiments have tested entanglement over spatial gaps. The assumption is that the ā€˜nonlocalā€™ part of quantum nonlocality refers to the entanglement of properties across space. But what if entanglement also occurs across time? Is there such a thing as temporal nonlocality?

 

The answer, as it turns out, is yes. Just when you thought quantum mechanics couldnā€™t get any weirder, a team of physicists at the Hebrew University of Jerusalem reported in 2013 that they had successfully entangled photons that never coexisted. Previous experiments involving a technique called ā€˜entanglement swappingā€™ had already showed quantum correlations across time, by delaying the measurement of one of the coexisting entangled particles; but Eli Megidish and his collaborators were the first to show entanglement between photons whose lifespans did not overlap at all. ā€¦

 

There is no single timekeeper for the Universe; precisely when something is occurring depends on your precise location relative to what you are observing, known as your frame of reference. So the key to avoiding strange causal behaviour (steering the future or rewriting the past) in instances of temporal separation is to accept that calling events ā€˜simultaneousā€™ carries little metaphysical weight. It is only a frame-specific property, a choice among many alternative but equally viable ones ā€“ a matter of convention, or record-keeping.