Quantum decision affects results of measurements taken earlier in time:
Due to the 104-meter fiber-optic cable, Victor’s measurements occurred at least 14 billionths of a second after those of Alice and Bob, precluding the idea that the setting of the BiSA caused the polarization results to change. While comparatively few photons made it all the way through every step of the experiment, this is due to the difficulty of measurements with so few photons, rather than a problem with the results.
Ma et al. found to a high degree of confidence that when Victor selected entanglement, Alice and Bob found correlated photon polarizations. This didn’t happen when Victor left the photons alone.
Suffice it to say that facile explanations about information passing between Alice’s and Bob’s photons lead to violations of causality, since Alice and Bob perform their polarization measurement before Victor makes his choice about whether to entangle his photons or not. (Similarly, if you think that all the photons come from a single laser source, they must be correlated from the start, and you must answer how they “know” what Victor is going to do before he does it.)
The picture certainly looks like future events influence the past, a view any right-minded physicist would reject. …
Nevertheless, this experiment provides a realization of one of the fundamental paradoxes of quantum mechanics: that measurements taken at different points in space and time appear to affect each other, even though there is no mechanism that allows information to travel between them.
My brain hurts.
(Note that Alice, Bob, and Victor are not actual people but mechanisms.)
This Wind Map of the US is almost perfect. It just needs a dot for Miami.
(via Slashdot, Wind Map of US Will Blow You Away)
Perhaps it is time to subject investment bankers and derivatives traders to routine random drug tests. It’s widely believed that many of them use cocaine (although meth use may be rising), and I read that drug use on Wall Street is a real problem, although of course it has also beem rampant for a long time. The health of the economy is too important to be left in the hands of potentially drug-addled brains.
After all if it’s necessary to drug test welfare applicants and unemployed people seeking job training (who have the same 2% positive rate as found on Wall St) and high school football players, it is all the more important to drug test the masters of finance given the enormous effect that their work has on others.
Or, perhaps, we should agree to only drug test people armed with weapons or holding security clearances?
Confirmation of what I always believed: fly a plane, catch a cold. Of course, this year I have managed to have a nasty one without going anywhere.
(Spotted via SFDB.)
Homeopathic leak threatens catastrophe:
An accidental release of highly dilute homeopathic waste from a research institute in Swindon has led to calls for the centre to be shut down. Plant operators have admitted responsibility for massive safety blunders after a spilled drop of an enormously dilute test product was cleaned by a caretaker, and in complete disregard of all safety procedures, allowed to enter the water system after he emptied his mop bucket down the drain.
And as we all know, the more dilute it gets, the more powerful it gets…
Next to the Plant are seven abandoned Fire Engines – exposed to such dangerously low concentrations of homeopathic contamination that they can never be used again – they will eventually be entombed in concrete where they lie.
Local Fire Chief, Boutros-Boutros Jones gave a frank account of the current situation; ‘We have to accept that we’ve lost the battle locally, two water treatment works may never be safe to use again, but the fight to contain this and prevent further dilution is still on. Clearly if this reaches the sea, it’s game over.’
It never ceases to amaze me when I visit there just how popular homeopathic remedies are in France.
I was sorry to learn that there is likely a very rational explanation for the Pioneer anomaly, the 30-year mysterious deceleration of the Pioneer spacecraft once it got out of the solar system, a mystery much loved by science fiction readers. I would have liked the mystery even better if there had been an unexplained acceleration, but you can’t have everything.
It seems that no singularities are involved after all, and that gravity doesn’t get stronger or weaker at long distances either. Heat ‘Most Likely Cause’ of Pioneer Anomaly:
A number of possible explanations have been proposed over the ensuing decades, including the possibility that gravity behaves differently at such large distances from earth — thereby requiring a modification of gravitational theory.
But over the last couple of years, evidence has been pointing more strongly to heat as the most likely culprit. Specifically, heat from the plutonium inside the spacecraft’s generators, some of which got converted into electricity while the rest of it radiated into space. If it did so unevenly, radiating more heat in one direction than in another — only a 5 percent difference is required — that might be sufficient to give rise to the Pioneer anomaly.
Found via Slashdot.
UM’s Jha lab (in the Psychology Department) has secured a $920K grant to “track the structural and functional brain changes that may accompany participation in short-form mindfulness training courses”.
Scott Rogers, Director of the Mindfulness in Law Program at the University of Miami Law School will be collaborating in the research.
I wonder if law students will be getting their brains scanned?
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