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2d
comment How is it possible to accelerate a neutron?
the waveguide would need another superposed RF oscillation that is synchronized with the gradient sections in order to exchange the spins in order to avoid them to diverge, unless that is what the systems designer wants
2d
comment How is it possible to accelerate a neutron?
ah Stern-Gerlach is a good approach. Even a tiny gradient over a long waveguide could be good enough for focusing the neutron beam, even if not producing much longitudinal acceleration. You should write a paper about it @dmckee
2d
comment What technology can result from such expensive experiment as undertaken in CERN?
It depends on how much disruption a given source can cause and how much of that disruption do you need in order to complicate things to the rogue party. Those isotopes take time to accumulate in adequate quantities, so is not obvious to me that is an unworkable idea
2d
awarded  Nice Answer
Sep
16
comment What technology can result from such expensive experiment as undertaken in CERN?
in what grounds did you judge it is not exactly a science publication? is that supposed to be some sort of appeal of authority argument? in any case I posted it in the hope that you would bother to check the references in the article and at least read the abstracts, oh well. I added direct references on the answer
Sep
16
revised What technology can result from such expensive experiment as undertaken in CERN?
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Sep
16
revised What technology can result from such expensive experiment as undertaken in CERN?
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Sep
16
comment What technology can result from such expensive experiment as undertaken in CERN?
hplusmagazine.com/2014/06/05/…
Sep
16
answered What technology can result from such expensive experiment as undertaken in CERN?
Sep
15
awarded  Nice Question
Sep
11
answered H-theorem and Boltzmann equation applied to Boltzmann distribution
Sep
7
awarded  Self-Learner
Aug
26
revised A curious case of Relativistic Velocity Addition
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Aug
26
comment A curious case of Relativistic Velocity Addition
ah that's the issue
Aug
26
comment A curious case of Relativistic Velocity Addition
did you roll it back? I'm still seeing it messed up
Aug
26
comment A curious case of Relativistic Velocity Addition
oh my. It was right before? It didn't render at all
Aug
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revised A curious case of Relativistic Velocity Addition
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Jul
29
comment Negative energy/mass bounds on de-Sitter spacetime
Another thing: "energy in cosmology is not conserved" is an statement that is true both on de-Sitter and Anti-de-Sitter cosmologies, but the lack of the energy-positiveness-theorem is specific to de-Sitter spaces, so I hope that you see that the former does not by itself explain the latter
Jul
29
comment Negative energy/mass bounds on de-Sitter spacetime
but energy conservation as a constraint is a completely independent constraint on the system than energy positivity: energy conservation for non-gravitational fields is just the divergencelessness of $T_{\mu \nu}$, but energy positivity is about quantum inequalities and energy conditions.
Jul
28
comment Negative energy/mass bounds on de-Sitter spacetime
"the total conserved energy can't be well-defined in our (nearly) de Sitter space" I'm not wondering about energy conservation, What I'm wondering is negative mass concentrations as would be expected if the positive-energy theorem does not hold. You seem to be conflating the issue of energy-conservation in GR (which as you rightly said, the lack of a Killing time vector means that it is absent) with that of negative energy. Why are both issues related?