Recent content by Spinnor

That is one of the first things you learn when you study the physics of graphene. A standing wave in graphene is a bit more complicated. I am not sure if you answered my question though, "Can the standing probability wave be shifted forward or backward in the direction of the momentum vectors...

Consider the standing wave of probability at the edge of the first Brillouin zone in a 1D crystal for an electron, first figure b below, which gives rise to a band gap, It is clear from the first figure b where we get the gap in energy, for an electron more likely near the ion cores, lower...

In your paper you write (https://arnold-neumaier.at/ms/univQP.pdf page 29), "The situation is essentially the same for electrons and other particles. Their scattering produces spherical waves in which the electron field (and hence the charge) is delocalized and locally fractional. For...

I think the book is based on a series of lectures he gave, Your questions my be answered by watching them. The arrows in question spin very fast but also shrink in length proportional to the 1/(length of the path)? If the path length difference is of order the wavelength of the light the...

Edit, after some thought I want to remove the power recycling mirror from the interferometer below. I think that will simplify my thought experiment. Assume we have a LIGO type interferometer which is adjusted so that all light exits the detector port. Fire a single short attenuated laser pulse...

That was part of the technical hurdles I suggested there might be. Preform the experiment in water or a small amount of smoke should do the trick?

Example of Femto-photography, I would like to know if I understand the results of a Femto-photography Michelson Morley interferometer thought experiment. From a Google search of Femto-photography, Femto-photography is a technique that visualizes the propagation of light at an incredibly high...

It should be easy to 100 percent clean your phone, I will grant you a reset probably gets you pretty close and is simple. My current phone was bought used through a 3rd party, it might have yuk in it? Maybe just a matter of taking it as a challenge and get to it. Thank you.

The paranoid in my head says they will install their own malware. 😬

My wife got a nice new used phone from a friend for me. Being paranoid I don't trust the phone. Google tells me that a factory reset will not necessarily rid the phone of possible evil malware. Further Google tells me there is a process "flash a new image on my phone bootloader mode" that should...

I think most of his students that sat through the Feynman lectures on physics would agree with you, I think he points this out in the last lecture?

I don't think it is, I think he represents this technique as basis of quantum electrodynamics but to be sure I would have to watch his Auckland lectures again.

In Feynman's The Strange Theory of Light and Matter the simple technique for calculating quantum amplitudes for simple optical phenomenon by adding arrows is given. Could that same technique in principle be used to calculate the amplitude for a photon to arrive at the detector port of the LIGO...

What is the state of the art, Google does not turn up much published work. I would like to be able to consider photon paths through LIGO. Thank you.

Take one of a pair of metal cones and put a coax cable sized hole in the center of that cone. Let the "tops" of the cones face each other separated a distance a fraction of the diameter of the metal cones. Take a coax cable and connect it to the hole of the one cone (from the "inside" of the...