A permanent magnet is a piece of metal, usually iron, which has a permanent magnetic field associated with it.
The way such materials can be explained in terms of zero-point photons, is that the atoms making up a permanent magnet are arranged in such a way that their electrons hook onto one side of nearby zero-point photons more readily than the other side.
The more coordinated and vigorous the atoms are in their lopsided effect on zero-point photons, the stronger the magnet.
Bouncing about inside a magnet, zero-point photons become polarized. They are also given direction and spin. The photons are led into paths going in a north-south direction.
The result is a stream of polarized zero-point photons exiting the magnet from both poles in equal measure.
Correspondingly, there must be entry points for photons at the poles. Otherwise, there would be a permanent photon high-pressure at the poles and a corresponding low-pressure at the sides. This would violate the laws of thermodynamics, and is obviously not happening.
When outgoing polarized photons meet incoming photons, they brush into them, sharing some of their spin. This polarizes the incoming photons as they head towards the magnet. Even before they enter the magnet, they have a certain degree of polarization.
Note that spin is transferred between orbs of opposite charge. Orbs with identical charge do not react with each other since they cannot latch onto each other. However, negative orbs communicate their spin to positive orbs and visa versa. This allows for spin to be maintained and shared.
The sharing of spin from outgoing to incoming photons produces a pattern in which highly polarized outgoing photons are surrounded by progressively less polarized photons. Between each highly polarized outgoing photon, there is a valley, so to speak, of less polarized photons.
To see a manifestation of this pattern, all we have to do is to put a ferro-fluid on top of a magnet.