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[XT] Einstein's action at a distance: 10,000 times faster than light

post #1 of 174
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A team of Chinese physicists have clocked the speed of spooky action at a distance — the seemingly instantaneous interaction between entangled quantum particles — at more than four orders of magnitude faster than light. Their equipment and methodology doesn’t allow for an exact speed, but four orders of magnitude puts the figure at around 3 trillion meters per second.

Spooky action at a distance was a term coined by Einstein to describe how entangled quantum particles seem to interact with each other instantaneously, over any distance, breaking the speed of light and thus relativity. As of our current understanding of quantum mechanics, though, it is impossible to send data using quantum entanglement, preserving the theory of relativity. A lot of work is being done in this area, though, and some physicists believe that faster-than-light communication might be possible with some clever manipulation of entangled particles.

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post #2 of 174
i like this!
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post #3 of 174
"Their equipment and methodology doesn't allow for exact speed calculation"
This means that it could be instantaneous, but because of the inefficiency of their experiment, they're just registering it at some arbitrary value based on their equipment. If Entanglement actually did have travel time, it would violate QM since QM predicts that it is in fact instantaneous. Imagine if you had two entangled particles spanned across the distance of the universe. Even at 10,000 times the speed of light, it would still take a very long time to get from point A to Point B; my point is that what if something collapsed the entanglement state at both ends at the same time so that they had a set spin? Two "signals" traveling at that speed would reach the particles which had already been changed, and you could know the before and after state(after state meaning when the signal has reached the entangled particle). And thus, based on the difference of time the states changed, (for example one or two microseconds), you could send information faster than FTL in the form of zeroes and ones, which violates relativity and QM. If this is true both theories are wrong, and that is a massive claim.
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post #4 of 174
Quote:
Originally Posted by serp777 View Post

"Their equipment and methodology doesn't allow for exact speed calculation"
This means that it could be instantaneous, but because of the inefficiency of their experiment, they're just registering it at some arbitrary value based on their equipment.

They say exactly that
Quote:
we know that spooky action at a distance has a lower bound of four orders of magnitude faster than light, or around 3 trillion meters per second. We say “at least,” because the physicists do not rule out that spooky action is actually instantaneous — but their testing equipment and methodology simply doesn’t allow them to get any more accurate.

And it isn't an arbitrary value, it is a lower bound that they were able to establish with their setup.
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post #5 of 174
if data can go faster than light,m than so can I
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post #6 of 174
I like it when these complex are presented here and all of a sudden these threads are flooded with "experts" arrowheadsmiley.png
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post #7 of 174
I don't get the word instantaneous. Is time absolute? It happens at the same time in all frames of reference?
post #8 of 174
Rudy Schild calculated the speed of quantum entanglement to be c squared almost a decade ago now. The only news here is that we have physical evidence of something the math has told us for quite some time.
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post #9 of 174
I knew I'd see Chakravant here, LOL. wink.gif
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post #10 of 174
" Einstein's action at a distance: 10,000 times faster than light "

I am disappoint. Thought this was going to be warp drive thread frown.gif

tongue.gif

I'd rather believe it is not instantaneous and is something that actually travels at over the speed of light, because that makes star trek concepts ( their obviously faster than light communication for example...) more possible xD
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