My background is as a PhD physicist whos main association with quantum mechanics wave particle duality was in
1) solid state physics: electrons and ‘cooper pairs’ of electrons in superconductors and crossing barriers by tunneling
2) figuring out the noise properties of amplifiers treating high frequency radio waves as both waves and particles.
The diffracted electron does not go through one slit or the other. To see if it goes through one slit or another you have to, for example, turn a light on to look at the electron. You see the electron by bouncing photons off the electron. When you turn a light on of sufficiently short wavelength to see which slit the electron goes through two things happen:
1) you see the electron go through one slit or the other
2) the diffraction pattern formed by electrons disappears! Bouncing photons off the electrons in order to see them with sufficient resolution to determine which slit they go through also screws up the correlation required to get two-slit diffraction patterns.
So now you turn the light back off, you can’t see which slit the electrons are going through, and you see the banded diffraction pattern past the slits building up again.
This is the uncertainty principle. In order to localize the electron sufficiently to restrict it to one slit or the other, you have to randomize its momentum to the point that two-slit diffraction effects are blurred out. In order to “localize” the electrons momenta to the point that you see diffraction patterns, you have to randomize its location to the point that you cannot actually, even in principle, say it went through one slit or the other.
I may be giving you one QM “interpretation” here. But I have not seen any “Many Worlds” interpretations that overcome the uncertainty principle and can also be used to calculate the results of experiments. I admit these descriptions may not exist, but the way I describe the electrons and slits absolutely can be used to make quantitative predictions that fit experiments.
My background is as a PhD physicist whos main association with quantum mechanics wave particle duality was in 1) solid state physics: electrons and ‘cooper pairs’ of electrons in superconductors and crossing barriers by tunneling 2) figuring out the noise properties of amplifiers treating high frequency radio waves as both waves and particles.
The diffracted electron does not go through one slit or the other. To see if it goes through one slit or another you have to, for example, turn a light on to look at the electron. You see the electron by bouncing photons off the electron. When you turn a light on of sufficiently short wavelength to see which slit the electron goes through two things happen: 1) you see the electron go through one slit or the other 2) the diffraction pattern formed by electrons disappears! Bouncing photons off the electrons in order to see them with sufficient resolution to determine which slit they go through also screws up the correlation required to get two-slit diffraction patterns.
So now you turn the light back off, you can’t see which slit the electrons are going through, and you see the banded diffraction pattern past the slits building up again.
This is the uncertainty principle. In order to localize the electron sufficiently to restrict it to one slit or the other, you have to randomize its momentum to the point that two-slit diffraction effects are blurred out. In order to “localize” the electrons momenta to the point that you see diffraction patterns, you have to randomize its location to the point that you cannot actually, even in principle, say it went through one slit or the other.
I may be giving you one QM “interpretation” here. But I have not seen any “Many Worlds” interpretations that overcome the uncertainty principle and can also be used to calculate the results of experiments. I admit these descriptions may not exist, but the way I describe the electrons and slits absolutely can be used to make quantitative predictions that fit experiments.
I don’t think any interpretation provides a novel set of tools for measurement or prediction.