As a shameless plug I'd like to suggest the project that I have been using for my personal credentials for quite some years now: https://derivepass.com/ . The encrypted website metadata is stored only locally (with only optional remote sync, and even that has to be your own server), and the passwords are not stored at all (they are generated from your master password).
Fantastic material! That being said I'd recommend to have several alternative textbooks for every subject at hand. Whenever stuck - one should switch to another and try a different take.
There are plenty of textbooks and lecture notes available online and that article links to most of the popular choices. Make sure to choose correct order of topics to avoid getting stuck!
Wow, thanks for the link! What an incredible resource! It’s really a shame that she had to become famous for being mistreated, rather than for writing such a helpful post as this.
I think photon self-interaction might be thought of as a confirmation of photon's existence. Particle ontology is a tough question, but I don't think there is a reason to exclude photon from the list without excluding all other particles.
Photons can also be seen as waves. And waves can also influence each other, in non-linear situations.
Because the experiments and theory are so simple, I think it is the most scientific approach, to at least test this Loader model more thoroughly. Even if I don't agree with it. ;-)
The light comes from bottom left, then gets into Beam Splitter (BS) and splits in two. The top-left detector has a pre-selected filter and a measurement device after a delay line. As far as I understand, this device gives binary output: either light received or not. The top-right detector captures whole image of the light ray, but does so only if the left detector has seen light.
The result is that the image from the top-right detector is highly correlated with the pre-selected filter of the top-left detector, even though they're placed in different arms of Beam Splitter! https://advances.sciencemag.org/content/advances/5/7/eaaw256...
Thank you for the setup explanation. I understood what is happening and it is totally fascinating, even if I do not - and probably never can - understand why or how this is happening.
