Jim Graber

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Relearning physics after more than fifty years.

	2,116 reputation	bio	website		visits	member for	2 years, 4 months
617 badges		location			seen	2 hours ago

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1d	asked	Quantum Field Theory and Hilbert space dimensionality
1d	comment	Why is Heisenberg's uncertainty principle not an experimental error since it is the error created by photons striking on elementary particles? arXiv:1201.5334 is another good Ozawa paper.
1d	comment	Why is Heisenberg's uncertainty principle not an experimental error since it is the error created by photons striking on elementary particles? Yes, that's the Distler paper. arXiv:quant-ph/0207121 is one of the best of several relevant papers by Masanao Ozawa and co authors. I didn't mean to imply that Ozawa and Distler were co-authors. Sorry for the confusion.
1d	comment	Hilbert space of a free particle: Countable or Uncountable? But then what are rigged Hilbert spaces good for? I thought their whole point was mixing countable and uncountable in a consistent way? A quick look at Wikipedia finds “They can bring together the 'bound state' (eigenvector) and 'continuous spectrum', in one place.”
1d	comment	Hilbert space of a free particle: Countable or Uncountable? So the total universe, or at least all of quantum mechanics, is countable? I was once told so by a very famous physicist, but I didn't think that was the majority position.
1d	asked	Hilbert space of a free particle: Countable or Uncountable?
May 19	answered	Radio antennas that are much shorter than the wavelength
May 5	answered	Why Quantum Mechanics as a non-fundamental effective theory?
Apr 30	asked	What is the difference between Cramer and Vaidman?
Apr 10	answered	Is black hole bright at center?
Apr 9	answered	What is baryon loading in the context of gamma ray bursts (GRBs)?
Apr 7	answered	Are photons deterministic?
Apr 5	asked	EPR vs. EPRBB? Why can't we perform the original EPR experiment?
Apr 5	comment	Is there any experimental evidence to support the Terrell rotation? For this reason, I do not accept the observation of aberration as observation of the Terrell effect, as it does not involve relativistic relative speeds between observer and object, unlike the Terrell effect.
Apr 5	comment	Is there any experimental evidence to support the Terrell rotation? I believe the Terrell-Penrose rotation is the result of the addition of two effects: One is the finite speed of light, which results in a rotation and is essentially the same as the aberration effect. The second is the combination of the of the Lorentz contraction, and the projection effect, which results in another apparent rotation. This second effect is not present in the aberration of starlight, but explains nearly fifty percent of the Terrell rotation at near light speeds.
Apr 2	answered	Interference and which-path information
Apr 2	asked	Is there any experimental evidence to support the Terrell rotation?
Mar 17	comment	Why is Heisenberg's uncertainty principle not an experimental error since it is the error created by photons striking on elementary particles? ArXiv search Distler and Ozawa for serious recent consideration that there are in fact two slightly different uncertainty principles, one intrinsic, and one disturbance based.
Mar 16	awarded	Notable Question
Mar 16	comment	Going through a ring of black holes Actually that is slightly oversimplified, but it is approximately correct.