“Spookiness” Confirmed by the First Loophole-Free Quantum Test

Re:“Spookiness” Confirmed by the First Loophole-Free Quantum... by evincarofautumn on Friday August 28, 2015 @12:14AM (#10133707)

The wave-particle duality is also often explained misleadingly. It’s not that particles sometimes behave as particles and sometimes as waves—it’s that they behave in the normal fashion, and sometimes our models for explaining their behaviours are wave-like and sometimes particle-like.

My intuition about the travel of photons is that, because of length contraction, there’s no distance to travel, so they don’t actually travel through a vacuum at all, and of course that’s why they don’t need a medium, and it takes no time at all—from the photon’s perspective, anyway.

The thing that blows my noggin is that this system we’re in is complex enough to express us, who may eventually have the ability to understand it from the inside. That’ll be the real trick. :)

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Re:“Spookiness” Confirmed by the First Loophole-Free Quantum... by pdonis on Friday August 28, 2015 @01:15AM (#10133843)

> My intuition about the travel of photons is that, because of length contraction, there’s no distance to travel

This is not correct. Length contraction, as a concept, doesn't apply to photons, because there is no inertial frame in which they are at rest. Or, to put it another way, length contraction and time dilation arise from the way that Lorentz transformations act on timelike and spacelike vectors; they rotate them (in the hyperbolic sense of "rotation"). But Lorentz transformations act differently on null (lightlike vectors): they don't rotate them, they dilate them (physically, this means that changing frames changes the frequency/wavelength of photons, rather than their speed).

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Re:“Spookiness” Confirmed by the First Loophole-Free Quantum... by evincarofautumn on Friday August 28, 2015 @04:41AM (#10134316)

Oh wow, thanks for the eye-opener. Was it a different term than length-contraction that I was looking for? I thought that acceleration toward c resulted in the contraction of distance, and at c the distance would simply be reduced to zero. Where did I miss the point?

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Re:“Spookiness” Confirmed by the First Loophole-Free Quantum... by mirimir on Friday August 28, 2015 @12:52AM (#10133788)

> My intuition about the travel of photons is that, because of length contraction, there’s no distance to travel, so they don’t actually travel through a vacuum at all, and of course that’s why they don’t need a medium, and it takes no time at all—from the photon’s perspective, anyway.

How is there length contraction in this experiment?

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Re:“Spookiness” Confirmed by the First Loophole-Free Quantum... by evincarofautumn on Friday August 28, 2015 @12:55AM (#10133794)

There isn’t, at least not as far as I understand. (Physics is just a hobby interest for me.) I was referring to GP’s comment about an intuition for how electromagnetic waves travel through vacuum.

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