3 ms·

This is my two cents: Maybe entanglement is a much more 'immediately physical' phenomenon than 'spooky action at a distance'. Just guessing as a layman here: m

This is my two cents: Maybe entanglement is a much more 'immediately physical' phenomenon than 'spooky action at a distance'. Just guessing as a layman here: maybe entangled particles are just physically connected {along some higher dimension / some unknown process}. Spinning together (effectively switching spaces constantly) such that they are always the same state. So the undetermined measurement stems from being unable to tell which particle specifically you have at the time of measurement. The idea of a particle's spin being 1/2 feels tied to this idea - (that a 720 rotation happens: if a particle P1 spins 360 in space A, spins 360 in space B before returning to space A, maybe entanglement is P1 and P2 filling space A and B to 'full'?) In other words - detector A may receive particle B or A depending on the particle's current orientation at measurement. Weird thoughts. Take with a lot of salt.

a_gnostic 3y ago
Did you know, antimatter is just time-reversed matter? So where did all our antimatter go… ? Yes, this ties into this.
- raattgift 3y ago
  No, it's not just time-reversal; it's charge, parity and time reversal. You can't just time-reverse an electron neutrino and obtain an electron anti-neutrino, because the parity will be wrong, and so will the weak isospin charge and lepton number ("lepton charge"). https://en.wikipedia.org/wiki/CPT_symmetry https://en.wikipedia.org/wiki/CPT_symmetry Worse, the symmetries of the Standard Model are pretty complicated, especially when one goes from the local Lorentz or Poincaré symmetries x SU(3) x SU(2) x U(1) to the global continuous symmetries that capture https://en.wikipedia.org/wiki/Custodial_symmetry https://en.wikipedia.org/wiki/Custodial_symmetry, (particlularly QCD) flavour symmetry, and scale symmetry. There are some further long-range approximate symmetries too, and those get worse with spacetime curvature. These all may have to be accounted for if one is time-reversing a region of the spacetime-filling fields of the Standard Model. > So where did all our antimatter go? Good question. Nobody can really tell you right now. Maybe there are galaxy clusters totally dominated by antimatter, maybe the antimatter is in a different Hubble volume, maybe it all annihilated into the cosmic microwave background and other ultra-low-energy relic fields (e.g. the cosmic (anti-)neutrino background) we haven't detected or discovered yet, maybe into primordial black holes, maybe in an extension of the Standard model to extremely high energies there isn't a matter-antimatter balance in the first place. One can write down an enormous number of different theories, and relax knowing that there is presently no evidence to favour or disfavour it, provided it's compatible with the experimental and astrophysical evidence we have today. (I do like the idea, building on an idea arising from Wheeler's one-electron universe, that anti-electrons (in this case more than one) are screened within pion condensates ("maybe they're hiding in neutrons", vaguely), because that makes the symmetries even crazier, and particle physicists deserve that).
onlyrealcuzzo 3y ago
> maybe entangled particles are just physically connected {along some higher dimension / some unknown process}. I have always thought this might be a possibility - but wouldn't we be able to observe this somehow? Is it actually possible this could happen and there's no way we could observe it? Gravity distorts space-time - but it's observable. For these particles to be connected still - wouldn't that be some disturbance in space-time?
- WXLCKNO 3y ago
  I imagine we haven't figured out how to observe it yet. Same as anything else we couldn't observe before we did. Ruling out "it's magic", we can presume that everything in the universe is linked logically somehow, the link between the two entangled particles must exist and we just haven't been able to observe it yet.
  - onlyrealcuzzo 3y ago
    I was wondering if it's somehow theoretically possible there is a link but for some reason we would never be able to observe it.

a_gnostic 3y ago

Did you know, antimatter is just time-reversed matter? So where did all our antimatter go… ? Yes, this ties into this.

raattgift 3y ago
No, it's not just time-reversal; it's charge, parity and time reversal. You can't just time-reverse an electron neutrino and obtain an electron anti-neutrino, because the parity will be wrong, and so will the weak isospin charge and lepton number ("lepton charge"). https://en.wikipedia.org/wiki/CPT_symmetry https://en.wikipedia.org/wiki/CPT_symmetry Worse, the symmetries of the Standard Model are pretty complicated, especially when one goes from the local Lorentz or Poincaré symmetries x SU(3) x SU(2) x U(1) to the global continuous symmetries that capture https://en.wikipedia.org/wiki/Custodial_symmetry https://en.wikipedia.org/wiki/Custodial_symmetry, (particlularly QCD) flavour symmetry, and scale symmetry. There are some further long-range approximate symmetries too, and those get worse with spacetime curvature. These all may have to be accounted for if one is time-reversing a region of the spacetime-filling fields of the Standard Model. > So where did all our antimatter go? Good question. Nobody can really tell you right now. Maybe there are galaxy clusters totally dominated by antimatter, maybe the antimatter is in a different Hubble volume, maybe it all annihilated into the cosmic microwave background and other ultra-low-energy relic fields (e.g. the cosmic (anti-)neutrino background) we haven't detected or discovered yet, maybe into primordial black holes, maybe in an extension of the Standard model to extremely high energies there isn't a matter-antimatter balance in the first place. One can write down an enormous number of different theories, and relax knowing that there is presently no evidence to favour or disfavour it, provided it's compatible with the experimental and astrophysical evidence we have today. (I do like the idea, building on an idea arising from Wheeler's one-electron universe, that anti-electrons (in this case more than one) are screened within pion condensates ("maybe they're hiding in neutrons", vaguely), because that makes the symmetries even crazier, and particle physicists deserve that).

onlyrealcuzzo 3y ago

> maybe entangled particles are just physically connected {along some higher dimension / some unknown process}. I have always thought this might be a possibility - but wouldn't we be able to observe this somehow? Is it actually possible this could happen and there's no way we could observe it? Gravity distorts space-time - but it's observable. For these particles to be connected still - wouldn't that be some disturbance in space-time?

WXLCKNO 3y ago
I imagine we haven't figured out how to observe it yet. Same as anything else we couldn't observe before we did. Ruling out "it's magic", we can presume that everything in the universe is linked logically somehow, the link between the two entangled particles must exist and we just haven't been able to observe it yet.
- onlyrealcuzzo 3y ago
  I was wondering if it's somehow theoretically possible there is a link but for some reason we would never be able to observe it.