Still from an animation of a NIST quantum entanglement experiment conducted in 2013.Yiheng Lin/NIST/YouTube
Posted on 06/13/2023 7:53:46 AM PDT by SunkenCiv
In the most massive test to date, physicists have probed a major paradox in quantum mechanics and found it still holds even for clouds of hundreds of atoms.
Using two entangled Bose-Einstein condensates, each consisting of 700 atoms, a team of physicists co-led by Paolo Colciaghi and Yifan Li of the University of Basel in Switzerland has shown that the Einstein-Podolsky-Rosen (EPR) paradox scales up.
The researchers say this has important implications for quantum metrology – the study of measuring things under quantum theory...
One of the tools we use to close one of the gaps is quantum mechanics, a theory that arose in the early 20th century, championed by physicist Niels Bohr, for describing how atomic and subatomic matter behaves. In this tiny realm, classical physics breaks down; when the old rules no longer apply, new rules must be made.
But quantum mechanics isn't without its flaws, and in 1935, three famous physicists found a significant hole. Albert Einstein, Boris Podolsky, and Nathan Rosen described the famous Einstein-Podolsky-Rosen paradox.
Nothing can travel faster than light, right? But it gets a bit tricky with quantum entanglement, what Einstein referred to as "spooky action at a distance". This is where you correlate two (or more) particles so that their properties are linked; if one particle, for example, spins one way, the other spins the other way.
These particles retain this link even over large distances, and it's unclear how or why. Scientists do know that if you measure the properties of one particle, you can infer the properties of the other, even over that distance.
(Excerpt) Read more at sciencealert.com ...
Still from an animation of a NIST quantum entanglement experiment conducted in 2013.Yiheng Lin/NIST/YouTube
So I wonder if you could separate a Bose-Einstein condensate into two separate clouds and put one in geosynchronous orbit, could you achieve instantaneous communication by changing one cloud and seeing the effects in another?
Theoretically, yes.......................
For some reason I thought I might understand some of that.
Loved that reply. Even though I have a background in some of this, I say that often.
So if you could get the bit rate high enough, you could have a live Zoom meeting from Mars.
Or Uranus.......................
“Using two entangled Bose-Einstein condensates, each consisting of 700 atoms”
That was my problem. I only used 699 atoms.
Yeah....I’m like that guy. Hunh?
(If this paradox raises the cost of a 6-pack of Bud Light, I’m all for it)
You dropped one on the floor..................
Lol. Nice to hear that. Tx.
so if a particle is quantumly entangled with another that’s light years away would that communication be instantaneous? I think that’s the goal for this research maybe. And of course quantum computing.
The old Star Trek “subspace communications?”
No, that won’t work.
No, not even theoretically.
No, it’s not. Quantum communication is possible but it cannot transmit any useable information faster than the speed of light.
Or endless PowerPoint sessions from Uranus.
Why? If correlative state changes are detectable and repeatable, then its simply a matter of which one is 0 and which one is 1. Plus a clock on each end. Same as measuring voltage on a gate.
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