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New magnetic component discovered in the Faraday effect

phys.org

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Re: New magnetic component discovered in the Faraday effect

#61

Post by uberduper »

ggm wrote: post #25
fragmede wrote: post #8

Earlier quoted context omitted.

what happens when you only send a single photon down the line though?

I've always wondered what degree of confidence exists amongst the cogniscenti that a single photon event happened. I tend to think the criteria of measurement here would suggest the most likely outcome was a shitload more than 1 photon, and that all the "but we measured we can see one only" measurements are themselvs hedged by a bunch of belief. That said, I do like the single photon experiment, when it's more than a…

Double slit experiment has been done with electrons which are, afaik, much easier to detect and send single file. It's been done with molecules. It's not a thought experiment.

Quantum superposition is real. There's no doubt about that.

Re: New magnetic component discovered in the Faraday effect

#62

Post by zyxzevn »

namanyayg wrote: post #2

We intuitively think in particles and see a world of billiard balls colliding with one another. But actually everything is merely waves and fields. There's going to be a time where humans finally reconcile the quantum with the newtonian -- and I can't wait for that day

3Blue1Brown has a very good explanation of how light works as a wave And the barber pole effect shows how matter (sugar) rotates light https://www.youtube.com/watch?v=QCX62YJCmGk

There is also evidence that "photons" are just thresholds in the material that is used to detect light. The atoms vibrate with the EM-wave and at a certain threshold they switch to a higher vibration state that can release an electron. If the starting state is random, the release of an electron will often coincide with the light that is transmitted from just one atom.

This threshold means that one "photon" can cause zero or multiple detections. This was tested by Eric Reiter in many experiments and he saw that this variation indeed happens. Especially when the experiment is tuned to reveal this. By using high frequency light for example. It happens also in experiments done by others, but they disregarded the zero or multiple detections as noise. I think the double detection effect was discovered when he worked in the laboratory with ultraviolet light.

Here is a paper about Eric Reiter's work: https://progress-in-physics.com/2014/PP-37-06.PDF And here is his book. https://drive.google.com/file/d/1BlY5IeTNdu1X6pRA5dnJvRq3ip6...

Re: New magnetic component discovered in the Faraday effect

#63

Post by uberduper »

namanyayg wrote: post #2

We intuitively think in particles and see a world of billiard balls colliding with one another. But actually everything is merely waves and fields. There's going to be a time where humans finally reconcile the quantum with the newtonian -- and I can't wait for that day

What a timely article and comment. I've been watching a lecture series over the last few days about quantum mechanics and the many worlds interpretation. And I have questions.

I may have missed it or didn't understand it when I heard it explained. What underpins the notion that when a particle transitions from a superposed to defined state, the other basis states continue to exist? If they have to continue to exist, then okay many worlds, but why do we think (or know?) they must continue to exist?

Re: New magnetic component discovered in the Faraday effect

#64

Post by moi2388 »

uberduper wrote: post #63
namanyayg wrote: post #2

We intuitively think in particles and see a world of billiard balls colliding with one another. But actually everything is merely waves and fields. There's going to be a time where humans finally reconcile the quantum with the newtonian -- and I can't wait for that day

What a timely article and comment. I've been watching a lecture series over the last few days about quantum mechanics and the many worlds interpretation. And I have questions. I may have missed it or didn't understand it when I heard it explained. What underpins the notion that when a particle transitions from a superposed to defined state, the other basis states continue to exist? If they have to continue to exist,…

Because quantum mechanics describes the universe with a wave function, which evolves according to the schroedinger equation.

In it, there is no notion of collapse. The only thing that makes sense is saying the observer becomes entangled with the measurement.

So if you only look at the Schrödinger equation, this is the only conclusion.

Wave function collapse is something which is simply added ad-hoc to describe our observation, not something which is actually defined in QM

Re: New magnetic component discovered in the Faraday effect

#65

Post by moi2388 »

geocar wrote: post #34
agentifysh wrote: post #32

so what exciting applications can we see from this?

We will put a box containing a little light and a magnet into every home and people will lose their goddamned minds looking at it every day

Hmm.. if only we could force this to somehow display ads..

Re: New magnetic component discovered in the Faraday effect

#66

Post by moefh »

rhdunn wrote: post #39
tsimionescu wrote: post #36

Earlier quoted context omitted.

Actually, Newtonian gravity can be added to QM and work perfectly well. It's GR gravity that doesn't work with QM, especially if you try to model very high curvature like you'd get near a black hole.

Quantum Electro-Dynamics (QED) is the application of Special Relativity (non-accelerating frames of reference, i.e. moving at a constant speed) to Electromagnetism. Thus, the issue is with applying accelerating frames of reference (the General in GR) to QM.

> Special Relativity (non-accelerating frames of reference, i.e. moving at a constant speed)

Sorry, but this is a pet peeve of mine: special relativity works perfectly well in accelerating frames of reference, as long as the spacetime remains flat (a Minkowski space[1]), for example when any curvature caused by gravity is small enough that you can ignore it.

[1] https://en.wikipedia.org/wiki/Minkowski_space

Re: New magnetic component discovered in the Faraday effect

#68

Post by sehansen »

gsf_emergency_6 wrote: post #21
magphys wrote: post #3

> To quantify this influence, the team applied their model to Terbium Gallium Garnet (TGG), a crystal widely used to measure the Faraday effect. They found that the magnetic field of light accounts for about 17% of the observed rotation at visible wavelengths and up to 70% in the infrared range. Nearly 20% seems already significant, but 70%?! that's massive.

Seems to be a minor typo . Paper: > 17.5% of the measured value for Terbium-Gallium-Garnet (TGG) at 800 nm, and up to 75% at 1.3 µm. Here's what the crystal looks like https://www.photonchinaa.com/tgg-terbium-gallium-garnet/ Here's transmission plot (UV-IR) https://www.samaterials.com/terbium-gallium-garnet-crystal.h... Note there's almost no effect on transmission Relevant? https://dspace.mit.edu/handle/1721.1/51819

Yes, the paper and magphys talks about rotation, not transmission.

Re: New magnetic component discovered in the Faraday effect

#69

Post by tsimionescu »

rhdunn wrote: post #39
tsimionescu wrote: post #36

Earlier quoted context omitted.

Actually, Newtonian gravity can be added to QM and work perfectly well. It's GR gravity that doesn't work with QM, especially if you try to model very high curvature like you'd get near a black hole.

Quantum Electro-Dynamics (QED) is the application of Special Relativity (non-accelerating frames of reference, i.e. moving at a constant speed) to Electromagnetism. Thus, the issue is with applying accelerating frames of reference (the General in GR) to QM.

None of these have anything to do with what I said. SR works just as well as classical mechanics with acceleration. If SR didn't work with acceleration, it would have never been accepted as a valid theory at all, it would have been a laughing stock, as acceleration was well understood since the times of Newton.

What general relativity does different from special relativity is that it extends the concept of relativity from inertial frames of reference to all frames of reference, even accelerating ones. In the process, it also explains the reason why inertial mass and gravitational mass happen to be the same, by tying the gravitational interaction fundamentally to the concept of acceleration.

Re: New magnetic component discovered in the Faraday effect

#70

Post by Noaidi »

I’m sorry if I offended anyone’s consciousness by bringing this up, but this can affect how we view the health effects of radio frequency electromagnetic fields.

Since the magnetic fields of these EMF’s can pass deeper into the body than the electric field, that would mean that the magnetic field can affect many of the voltage gated ion channels in the body. That’s including the brain.

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