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(Ars Technica)   Quantum entanglement is so adorable Oh by the way, your reality is broken   (arstechnica.com) divider line 61
    More: Misc, quantum entanglements, quantum states, quantum systems, speed of light, faster than light  
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5128 clicks; posted to Geek » on 31 Oct 2012 at 7:56 AM (1 year ago)   |  Favorite    |   share:  Share on Twitter share via Email Share on Facebook   more»



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2012-10-31 08:22:22 PM
Hmm, I thought reality was a hologrammatic projection of an MMORPG with the worst tech support ever.
 
2012-10-31 09:41:46 PM

MindStalker: italie: MindStalker: Author was drunk.

An easy way to explain how this works is to imagine a two random number generators which both the same seed. Take them to the ends of the universe and then have them both generate the next random numbers. Surprise, they generate the same number.

You can't use this to communicate faster than light, sorry.

Doesn't sound very random then. Might ant to get your money back.

Yep, this is how computers generate "random" numbers. Hint, they can't generate random numbers. Modern computers use things like Ethernet noise and keyboard/mouse movements to create a random seed. But still two computers using the same seed are supposed to generate the same "random" number.


Actually, it is based off the computer's clock.

/Has a CS friend who explained it to me.
 
2012-11-01 01:12:47 AM
I'm just gonna kick it back to this fark thread:
 
2012-11-01 01:13:42 AM
 
2012-11-01 07:00:34 AM

garron: What if the two "entangled" particles are still connected somehow?

Please allow me a weak analogy that communicates the point. If I have a dowel rod that is a mile long (humor me) and I twist it on one end, the other end would be in the same position as the end I twisted and the change would occur instantaneously - assuming the material had no elasticity of course. Its just and example.


Umm... no. Even if it had ZERO elasticity, there would be a delay in the other end twisting. Otherwise, you could make a dowel ten trillion miles long and use it for instant communication (say, put a pointer on each end and letters in a circle around it and point at letters in sequence).
 
2012-11-01 08:38:46 AM

garron: What if the two "entangled" particles are still connected somehow?

Please allow me a weak analogy that communicates the point. If I have a dowel rod that is a mile long (humor me) and I twist it on one end, the other end would be in the same position as the end I twisted and the change would occur instantaneously - assuming the material had no elasticity of course. Its just and example.

If the entangled particles are connected, no information would need to be exchanged at the speed of light. The communication occurs within the structure of the connected particles.

Not a physicist so please feel free to educate me on the absurdness of my theory.


If you were to twist a dowel or push it, the information that the dowel has been pushed travels at the speed of sound. You can test that one here on earth. If you have a 100 foot beam, and you shove one end, hit it with a truck, smash it with a wrecking ball, or do anything at all to one end, the information travels at the speed of sound (speed of sound in the material) to the other end. Yes, that does mean that it gets shorter during the experiment. If you hit it at the speed of sound, it moves at the speed of sound. Hit it at hypersonic speed, the material deforms, and still the compression wave moves at the speed of sound.

This is because "speed of sound" MEANS "speed of a compression wave in"
 
2012-11-01 08:45:07 AM
A good rule for determining whether a mental model of quantum physics is accurate is to ask yourself whether you can understand it- whether your brain immediately rejects quantum properties as nonsense. If it doesn't, your model is based on macro-scale object interactions and therefore it's inaccurate. So, the way to assess whether you understand quantum physics is to ask yourself "do I understand quantum physics?" and then take the opposite of your answer as the proper one.
 
2012-11-01 09:34:17 AM

ChaoticLimbs: So, the way to assess whether you understand quantum physics is to ask yourself "do I understand quantum physics?" and then take the opposite of your answer as the proper one


Or, you could not ask yourself, and be in a state of both understanding and _not_ understanding quantum physics.
 
2012-11-01 03:33:53 PM
I haven't met too many people who can grasp the simple idea that their actions have consequences. Do we really want to add a whole new layer of "reality" that people can't deal with? Think of the below average, average, and moderately above average!
 
2012-11-03 05:41:47 PM
Garron asked "What if the two "entangled" particles are still connected somehow?"

This is possible, but would imply an additional dimension along which they were still connected.
 
2012-11-03 05:45:24 PM

garron: What if the two "entangled" particles are still connected somehow?

Please allow me a weak analogy that communicates the point. If I have a dowel rod that is a mile long (humor me) and I twist it on one end, the other end would be in the same position as the end I twisted and the change would occur instantaneously - assuming the material had no elasticity of course. Its just and example.

If the entangled particles are connected, no information would need to be exchanged at the speed of light. The communication occurs within the structure of the connected particles.

Not a physicist so please feel free to educate me on the absurdness of my theory.


This is possible, but it would imply an additional dimension along which they were still connected.
 
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