Science Forums 2

[Boof-head]

What I've seen of the entanglement 'connection' is that we are definitely on it. Einstein had problems accepting that such spooky stuff was possible, but it seems to be a requirement. Photons, the simplest particle since it represents a single 'bit' of energy, are unconcerned about time or distance - we can still detect the ones emitted by the first universal expression, of radiation after the baryogenesis lead to nucleons, and these combined to form atoms with electrons, which released the radiation as they all recombined - it was the first free-field stuff.

But a photon with the right frequency can 'flip' the spin of an electron, in a low-energy cavity; a photon is 'spatial extent, with energy', the energy means it has motion. If the motion is 'stopped' in a cavity that has a way to absorb the spatial extent - by imprinting it in three dimensions - then it can be restored by copying the pattern, of a photon (actually a group of them, or a pulse), or modulating a carrier with the signal. This has been done with BECs and lasers.

So what's entangled, or superposed on what here? The CMB is 'entangled' with the first moments of the BB, it's a one-way signal, that is everywhere (zipping through anything transparent to microwaves, including you); another signal is the radiation from the furthest objects. When you combine these signals, is anything revealed by superposing them?

Electron spin is 'entangled' with photon frequency; a single electron has an entangled momentum, when it goes through a double-slit both ways; it 'decides' to land at a position on a screen, which is entangled with a wavefunction, which all the other electrons that make the same 'decision' are also in.

It's a connection that looks like it can divide and merge; a photon can transform into two, each transformation is exactly - up to a limit of exactness - one half of the original; although photon's spin isn't oriented in spacetime, it is oriented in 'entangled-time' since the division halves the spin of the original - photon spin is 1, so it doesn't matter to spacetime, but the twin photons are spin-polarised.