How much tension between recent AMS-02 80 Gev dark matter and Lux-Xenon negative results?
Recent results ( Arxiv 1610.03840 and 1704.08258) suggest a WIMP dark matter particle near 80 Gev. See also https://phys.org/news/2017-05-possibility-cosmic-rays-due-dark.html
If this particle really...
At one point they were supposed to be running with plain ordinary hydrogen now, leading up to deuterium and tritium next year. Have they even restarted the plasma runs? I am pretty sure they are done building (or rebuilding) the beryllium and tungsten based "iter like wall" Woops, Google says...
http://www.sciencemag.org/news/2016/09/stewart-prager-steps-down-director-princeton-plasma-physics-laboratory?utm_campaign=news_daily_2016-09-27&et_rid=17668404&et_cid=840230 There is more news on the NSTX-U problem this morning. it looks pretty bad.
It appears that Stuart Prager is “stepping down” as director of PPPL. I wish him well.
But in the announcement it refers to a “recent technical setback in the NSTX-U facility”.
I had not heard previously of this set...
Quantum Mechanics Without State Vectors
In this paper, SW proposes a formulation of QM based solely on density matrices.
Does this solve the problem? How is it similar or different to the AN formulation?
TIA Jim Graber
I did trace through the entangled but never simultaneously existing example. It does seem more or less obvious to me, but perhaps hard to prove. As far as I can remember, I have never seen anything published on this.
Thanks for the reply.,
"And finally: entanglement of 2 photons does not require them to have interacted in the past. Nor to have interacted with anything that ever interacted in the past. Nor to have ever co-existed. Or even have existed in a common light cone. None of this is consistent with your mental picture of...
""The Planck Length is so small that calculations show something vibrating within that length, would be so energetic it would become a black hole ""
"sounds ridiculous to me."
On the contrary,
actually this (first quotation) is a slightly poetic version, but it is essentially true.
Oak ridge perspective on ITER:
There will be a House of Representatives hearing tomorrow (April 20) at 10:00 am Washington time. ITER Director General Bigot is expected to testify...
What quantum mechanics (without collapse) predicts is that *everytime* you get half a silver atom in the first direction and another half of a silver atom in the second direction. That is the measurement problem.
I think all those thousands of people at CERN think that they work at a particle collider, and talk about particles all the time. Nevertheless, it is still possible that the wave picture or QFT could be more accurate than the particle picture (QM, or whatever you call it.) I think other posters...
Just at the last instant before they merge. The energy increases during the inspiral, and decreases during the ringdown.
The very brief in-between phase, sometimes called the "plunge" or the "merger" is when the peak occurs.
Who made the first very well-known illustration of gravity that causes space-time to curve around massive objects?
It is called Flamm's paraboloid, and dates back to 1916. You can see it here: https://en.wikipedia.org/wiki/Schwarzschild_metric
There is also a reference to the original...