Comment: Re:Wouldn't it be great... (Score 3, Informative) 75
English language version:
http://ajw.asahi.com/article/behind_news/social_affairs/AJ201205250024
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English language version:
http://ajw.asahi.com/article/behind_news/social_affairs/AJ201205250024
The expression "quantum fluid" can be misleading.
What they did here is make a system of coherent "polaritons" just as laser light is a bunch of coherent photons/light waves. As mentioned in the article abstract, a polariton is some combination of a photon (light particle) and an exciton. In turn, an exciton is a bound state of an electron and a hole from the semiconductor. (A hole is the 'vacant' positive charge created when an electron is removed, and may for all practical purposes be regarded as an anti-electron within the semiconductor.) If I understand correctly, the novelty in this work is not making the polariton condensate but the visualization of it. In that sense, the summary if way off.
This is surely not easy to grasp for the layman. What does this imply? As parent mentioned, making coherent quantum states or matter is a standard affair by now, and research focuses on extending our capabilities on all levels. It is necessary for our understanding of the fundamentals of quantum mechanics and how many particles conspire to make laboratory but also everyday matter. The practical possibilities for making devices out of "quantum fluids" is severely limited, since you almost always need extremely low temperatures to produce them. Only superconductors come close.
Parent is correct.
This system ("rekeningrijden") is being proposed for years now. While it is certainly very fair--polluter pays, and pays more during rush hour--it faces two large problems:
- Technical implementation. There have been so many public sector IT fails now, most recently with the public transport Oyster card, that everybody is getting really reluctant to introduce another technical solution to a social problem;
- Privacy concerns, as many commenters here already alluded to. Used to be not a big issue for most people the Netherlands, steadily gaining attention over the past few years.
I would guess that the research is quite solid, the press release is overhyping as usual.
What has been found is an excess of certain events (namely anti-muon-neutrino to anti-electron-neutrino oscillations), where "excess" is defined relative to the current best-established model. So what this experiment (if correct) shows, is that the current model is not good enough.
From the PRL paper:
The source of the excess remains unexplained, although several hypotheses have been put forward
One of those hypotheses is additional neutrino flavours, but this finding is not evidence for that.
From the discussion section at the end (emphasis mine):
For most traits, the effects of individual genes are too small to stand out against the combined influence of all other genes and environmental factors. Thus, our p-value of 0.02 on a sample of 2,000 individuals should be treated cautiously. The expectation in genetics is that only repeated efforts to replicate associations on independent samples by several research teams will verify initial findings like these. Thus, perhaps the most valuable contribution of this study is not to declare that ‘‘a gene was found’’ for anything, but rather, to provide the first evidence for a possible gene-environment interaction for political ideology.
Contrast this with TFA:
The study's authors say this is the first research to identify a specific gene that predisposes people to certain political views.
I hate it when this happens, makes people dumb.
Executive ability is prominent in your make-up.