Recent content by Ddddx

In an attempt to get people to read Bohr, I offer the following remarks. I hinted in my previous post that there is a deceptive situation in physics today where people are always talking about the "Copenhagen interpretation" even though what they say has absolutely nothing to do with it. It is...

An unfortunate situation today in physics is that if someone says he is talking about the "Copenhagen interpretation", then it is 100% certain that what he says has absolutely nothing to do with the actual Copenhagen view of Niels Bohr. If you want to find out what that is, you have to read...

The word "collapse" was never used by the founders of quantum theory. If you look at Feynman's lectures on physics volume 3, you will find exactly zero mentions of that word. It just isn't proper terminology, and seems to stem from a misunderstanding of what the wave function is.

There really is no such thing as collapse. It is as meaningless as saying that the probability P = 1/2 "collapses" once the coin lands heads. "Probability amplitudes, when squared, give the probability of a complete event. Keeping this principle in mind should help the student avoid being...

wave-particle duality was never about photons being "sometimes waves and sometimes particles". The idea of wave-particle duality is that the particle picture and the wave picture are both essential, and the experimental data has aspects which can only be described by a combined use of both. This...

What research is done by physicists is up to the physicists themselves, based on their own judgment. You should be aware that people at places like Harvard, Princeton etc don't consider LQG to be "cutting edge physics in QG", so they are unlikely to hire colleagues who work in that area...

What gave you the impression that holography has been ruled out?

Well, they certainly try to use science in love etc, but some would say that these people have a very limited reductionist worldview, who don't understand the purpose and limitations of thought, for example the whole "love is just a chemical reaction in the brain" and similar attitudes. One can...

They certainly are the foundation of quantum mechanics. You will probably recognize them more easily if I write them in the form H |psi> = ih ∂t |psi> P = -ih ∂x Or other equivalent ways.

I don't know what Griffiths wants to attack in that footnote, but he doesn't seem to be questioning the validity of the fundamental equations like E = hf.

I don't know why people keep saying wave-particle duality is outdated. The energy and momentum of a particle are associated with the frequency and wavelength of a wave. You have to introduce wave concepts like frequency into the description of particles. The equation E = hf and the...

what is the meaning of life?

A partial answer is that an 11-dimensional theory can be dual to a 10 dimensional string theory.

Strings are still fundamental in M-theory. While it is true we do not know what the final theory will look like, it is highly unlikely that strings will be completely replaced by something completely different. What we know about M-theory is still based on string perturbation theory and...

Since the hamiltonian E = √(P2 - m2) is relativistic, the theory is relativistic in the end. Its just that the language is non-relativistic because E and P enter into usual hamiltonian mechanics in an asymmetric manner, not respecting relativity.