I was recently reading about how Xanadu made a scalable, room-temperature-operating quantum computer using photons as qubits (see this link). It said that in the logic gates, it entangles two photons at some point, and in the video it just looks like two fiber-optic cables brought really close together with photons going through them. Could somebody please go more in-depth about how that works? I'm also having trouble understanding quantum logic gates (I understand classical ones though) so if somebody here would explain those that would be great.
Thanks in advance!