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[BBC] Physicists observe 'negative mass' - Page 5

post #41 of 47
Quote:
Originally Posted by girugamesh View Post

While these scientist are doing their sciency stuff in their large halcyon colliseums, there are children dying of cancer in Africa.

I'll take the bait. I don't care about the children dying in Africa.
post #42 of 47
Quote:
Originally Posted by girugamesh View Post

While these scientist are doing their sciency stuff in their large halcyon colliseums, there are children dying of cancer in Africa.

Obviously scientific research is the thing that leads to medical advances. What these halcyon colliseums do is just the groundwork for future scientists to apply this new knowledge in tech that cures. Sarcasm is nice but our age face huge antiscientific backlash with all that "vaxines bring autism" crap.
Edited by Kuivamaa - 4/20/17 at 12:39am
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post #43 of 47
Quote:
Originally Posted by Xanatos View Post

I'll take the bait. I don't care about the children dying in Africa.

Are you assuming with that statement that humankind can only work on one thing at a time? I never understood this argument at all.

Also for free markets to exist there must be poverty somewhere. Its all a zero sum game whether domestically or globally.
post #44 of 47
Quote:
Originally Posted by Mand12 View Post

The term "negative mass" I'm rather certain is there to grab headlines and be overly dramatic. What they've done is construct a particular quantum state that is self-trapping, in that when they apply a force to it it stays in one spot.

Also to illustrate its similarities with that of an electrical charge in being either positive or negative. After the dense rubidium atoms at near 0K expanded from being released in their laser trap the change in the way they were spinning were the cause of this opposite acceleration.

If I am understanding this correctly opposite acceleration could mean a pilot wave is inverted and the riding particle is being pushed in on itself and this is what causes this self trapping.

@girugamesh this was a good example of the impacts big data targeted conditioning has on a populace in both provoking and controlling an emotional response.
post #45 of 47
The source doesn't really go into much detail but I imagine this is just another statistical quirk of quantum mechanics. Just like quantum tunneling, where there is no physical path between point A and point B but the particle's waveform is smeared onto both positions so there's a chance that it could appear at B even though there's no way to get there. I'm sure this is another strangely confined quantum system where, statistically-speaking, some particles will move in bizarre ways that happen to look like they have negative mass. Things get really unusual when you manage to tightly-define one part of a conjugate variable pair. The other part quits making sense. So maybe they discovered a conjugate variable pair where one of the variables is mass, and were able to tightly control the other variable?
post #46 of 47
Quote:
Originally Posted by mott555 View Post

The source doesn't really go into much detail but I imagine this is just another statistical quirk of quantum mechanics. Just like quantum tunneling, where there is no physical path between point A and point B but the particle's waveform is smeared onto both positions so there's a chance that it could appear at B even though there's no way to get there. I'm sure this is another strangely confined quantum system where, statistically-speaking, some particles will move in bizarre ways that happen to look like they have negative mass. Things get really unusual when you manage to tightly-define one part of a conjugate variable pair. The other part quits making sense. So maybe they discovered a conjugate variable pair where one of the variables is mass, and were able to tightly control the other variable?

The journal paper does, and yes, it's a statistical quirk of quantum mechanics. A bit more involved than tunneling and such, this has to do with the "dispersion relation" - a way of understanding the distribution of energy and momentum of particles exhibiting quantum mechanical behavior. Through some quantum weirdness, some of the atoms end up having a momentum in the opposite direction of what you would expect, and they have termed this "negative mass."

This doesn't have to do with conjugate variables, directly, though.
post #47 of 47
Hey, mr. Scientist, what about this hoverboard and anti-gravity drive for cars?
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