Recent content by gentzen

I always associate the MEBES e-beam mask writers (and the corresponding file format) with Etec. But they also had the ALTA advanced scanned-laser mask lithography tool product line. Today‘s laser-based mask writers mostly come from Mycronic...

No, high end masks are written by e-beam lithography, either by VSB (variable shaped beam) machines, or by electron multi-beam (grey scale pixel based) mask writers. Inspection can use lasers for OCD (optical scatterometry), but defect review and repair is done again by e-beam (or ion-beam)...

The discussion did not just "feel" more substantive. What I have watched so far (~1h 43min) was factually a lot more substantive than many previous discussion of Barandes, not just the one with Maudlin. What is different is that Barandes understood various critisisms of his approach in the...

What is your point? I already agreed with Roberto Pavani that one can interpret the word "intrinsic" (including connotations) in a way which excludes "frame-covariant properties". But if I have an electron, then I do think of its four-momentum as a property of the electron.

As I said, I don't see why "frame-covariant properties" should be considered to depend on "a particular choice of frame". I already agreed to that part above:

I see. But then it mostly boils down to how one wants to interpret the word "intrinsic" (including connotations) and how one wants to denote "frame-covariant properties" with another word like "extrinsic" with other appropriate connotations.

So you mean, only a scalar property can be intrinsic to the particle? I don't see anything wrong with a Lorentz covariant vector like the four-momentum. Of course a scalar property is frame-invariant, but I see nothing wrong with frame-covariant properties.

I disagree: we do understand why there is the phenomena of time dilation in special relativity. Maybe not as a community, but if some Havard philosophy professor like Jacob Barandes would try to publish an excellent explanation of the phenomena today, at least one of the reviewers would likely...

It should be irrelevant how I or everyone else reads it. The phrase goes back to Einstein, so only the context(s) in which he said or wrote it should be relevant for the meaning of that phrase. I tried to find those contexts now, and only one turned up, in a letter to Max Born from 3 March...

Einstein used „spooky action at a distance“ in his letter to Max Born, where he complained about the wavefunction in 3n-dim configuration space, and the collapse of the wavefunction. That was long before the EPR paper. I am not aware that Einstein used that expression again later, let alone with...

Padmanabhan doesn't claim this. Art Hobson is the one who believes this. I guess Padmanabhan's textbook on QFT and his long paper (58 pages) are substantial and essentially "correct". Yeah, it is an interesting question whether forming self-adjoint operators is still crucial in QFT. You could...

See https://www.physicsforums.com/threads/understanding-barandes-microscopic-theory-of-causality.1080105/post-7302909, especially I won't say "go read the paper," especially since I only read the first third of that paper. I guess it is a good paper, and I should read the other two thirds too...

Try to become familiar with differential equations first. Then try to become familiar with Eigenvalues and Eigenvectors of symmetric matrices, i.e. diagonalization. Next extent from symmetric matrices to Hermitian matrices, and from Hermitian matrices to self-adjoint operators. That last step is...

Padmanabhan's paper "Obtaining the Non-relativistic Quantum Mechanics from Quantum Field Theory: Issues, Folklores and Facts" (https://arxiv.org/abs/1712.06605) is long (58 pages) and substantial, therefore it deserves its own thread. Here is a recent discussion about Padmanabhan's paper in an...

Art Hobson certainly makes strong claims: Whether his evidence is strong enough to back those claims might be a topic for another thread. I haven't found a review of his latest book yet, but some of his related papers and "letter to editor" did cause some reactions.