3 ms·
photons entangle at a distance as there is tech in the market right now in cryptography that uses entangled photons over distances of several miles into orbit.
by motohagiography 2y ago
photons entangle at a distance as there is tech in the market right now in cryptography that uses entangled photons over distances of several miles into orbit.
the naive intuition is that lensing hawking radiation might stabilize unstable elements for longer periods.
- vlovich123 2y agoHuh. I thought you had to entangle them locally & then separate them maintaining entanglement. Entangling at a distance is weird. Can you provide a source of entangling particles remotely on Earth & in orbit?
- tsimionescu 2y agoNo, you entangle them locally and they maintain their entanglement as they move away from each other.
- vlovich123 2y agoYeah, even entangling particles remotely seems to require two pairs of entangled particles locally, sending each half somewhere, entangling the remaining local halves again locally and then using quantum teleportation to transfer the entanglement to the remote pairs together. So while you could do this to entangle a particle to a black hole, you’d still need to travel to the black hole classically and there’s no way to do this today as the nearest black hole is over 1k light years away. I’m not aware of any theoretical or experimental way to straight up entangle unrelated particles remotely but I don’t know QM enough to say it’s straight up impossible but it would violate my understanding of how entanglement works. That being said it is an interesting thought experiment although in practice I doubt you’d measure anything particularly interesting through the entanglement and more importantly it’s not clear entanglement would survive near a black hole since we don’t have a unified model of gravity and QM.