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Quantum ‘spookiness’ passes toughest test yet

53 pointsby jcrover 9 years ago

5 comments

saurikover 9 years ago
FQXi (39 comments):<p><a href="https:&#x2F;&#x2F;news.ycombinator.com&#x2F;item?id=10130203" rel="nofollow">https:&#x2F;&#x2F;news.ycombinator.com&#x2F;item?id=10130203</a><p>Nature (1 comment) (same link as this one):<p><a href="https:&#x2F;&#x2F;news.ycombinator.com&#x2F;item?id=10135260" rel="nofollow">https:&#x2F;&#x2F;news.ycombinator.com&#x2F;item?id=10135260</a><p>Scientific American (0 comments):<p><a href="https:&#x2F;&#x2F;news.ycombinator.com&#x2F;item?id=10139598" rel="nofollow">https:&#x2F;&#x2F;news.ycombinator.com&#x2F;item?id=10139598</a><p>Ars Technica (0 comments):<p><a href="https:&#x2F;&#x2F;news.ycombinator.com&#x2F;item?id=10141658" rel="nofollow">https:&#x2F;&#x2F;news.ycombinator.com&#x2F;item?id=10141658</a><p>Forbes (0 comments):<p><a href="https:&#x2F;&#x2F;news.ycombinator.com&#x2F;item?id=10129946" rel="nofollow">https:&#x2F;&#x2F;news.ycombinator.com&#x2F;item?id=10129946</a>
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fryguyover 9 years ago
My understanding is that entanglement doesn&#x27;t actually allow for transfer any information faster than the speed of light but is more like having two coins sealed in a box and given to two parties, that &quot;God&quot; always keeps the same way up until they&#x27;re opened. You can manipulate them by flipping the coins over, but you don&#x27;t know what it was originally. You can open your box and see that your coin is heads, and send a conventional message to the other person that says &quot;if your coin is heads, then attack at dawn&quot;, but you don&#x27;t know what the coin is until you open it, so are still reliant on sending the message over means that obey the speed of light in order to transfer the information.<p>Is that an accurate (given that it&#x27;s an analogy) description of how entanglement works, or does this work disprove that idea and is what was mentioned as Einstein&#x27;s idea?
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crishojover 9 years ago
Can anyone explain (in layman-like terms) how one goes about transporting a single photon over a distance of 1.3km? I really like to have a general idea of the technology involved.<p>&quot;The researchers started with two unentangled electrons sitting in diamond crystals held in different labs on the Delft campus, 1.3 kilometres apart. Each electron was individually entangled with a photon, and both of those photons were then zipped to a third location.&quot;
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skarapover 9 years ago
Every time I read something on quantum theory I can&#x27;t help but notice how close to notion of magic it feels like. And I&#x27;ve studied physics in college.<p>Some time ago I thought how strange these all would look to someone who had no knowledge in physics at all. But then I got it: two particles in different galaxies being entangled is not much different from calling someone on the other side of the globe using a cellphone if you don&#x27;t have prior knowledge&#x2F;beliefes about either.
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rhelsingover 9 years ago
Sometimes I feel like the writers from Lost are in control of our universe, improvising plot twists as we get seemingly closer to understanding how things work.