Quantum Computing, Entanglement, Quantum Physics, Information Theory, Qiskit.
the signal and idler photons can be entangled. For example, if the signal photon is horizontally polarized (H), the idler photon will be vertically polarized (V), and vice versa. The entangled state can be written as: The orbital angular momentum (OAM) of the photons can also be entangled. OAM is