WernerQH's latest activity

I just copied the wikipedia reference, and it seems to point to a nature paper with that title. Unfortunately it's behind a paywall...

Have a look at https://en.wikipedia.org/wiki/Hanbury_Brown_and_Twiss_effect The effect seemed puzzling at the time, because of Dirac's...

Gentzen, thanks for investigating. :-) My copy of that arxiv paper is dated February 15, 2024. So I probably became aware of it also...

A while ago @bhobba pointed to an interesting paper by T Padmanabhan: "Obtaining the Non-relativistic Quantum Mechanics from Quantum...

Thanks. This answered my question.

The position-momentum uncertainty principle is alive and well. I don't know the history, but certainly one still sees the erroneous...

Did you mean: ? (my favorite Griffiths quotation)

I think the first alternative is better, but it depends on how you define ΔE and Δt. For ## \Delta t ## it is customary to use the...

A vector ## \ket{\Psi} ## in Hilbert space, multiplied by any complex number(*), represents exactly the same state. That's why it is...

I learned that $$|e^{i\pi}|=|\pi^{ie}|=|i^{e\pi}|=1$$

Just to add to all the correct comments that were made already: The wording above is dangerous because it mixes two different pictures...

##Y^m_l## is a function of two variables that has complex values on a sphere. Following @WernerQH in post #6, ##p_z## is described by...

Wavefunctions are usually written down in a coordinate system where the z-axis is singled out, i.e. the azimuthal quantum number ## m ##...

For the most part, the problem is that string theory and GUTs and other BSM models simply don't make predictions about parameters at...