How does a photon interact with a conduction band electron? In conductors the valance and conduction band overlap so there are free electrons. If a radio frequency photon hits one of those electrons (as in the case of an antenna), what will that electron do? Will it absorb the photon and oscillate up and down the antenna, or will the photon scatter or something else? There is a lot of information on how higher energy photons interact (like the photoelectric effect), but I want to know how a low energy photon interacts with conductor electrons.
An electromagnetic wave consisting of multiple photons will move the electrons up and down the antenna depending on polarization, but what will a single photon do?
 A: Quantum mechanics is the underlying basic theory of  matter for the mainstream models of physics. All other theoretical  models can be proven mathematically to  emerge from this quantum level . The basic tenet of quantum mechanics is that all observations and measurements depend on the probability of an interaction happening given by the wavefunction describing the system. A simple example is the hydrogen atom where the (x,y,z,t) of the electron around the proton is given by the wavefunction  of the solution of the quantum mechanical equation for the hydrogen atom.. This means that to get the location of the electron around the proton one has to do many measurements and plot the distribution of the probability to find the electron. For complicated atoms and molecules one gets orbitals, not orbits. In the case of matter in bulk in addition the potentials entering by the attractive forces between molecules create lattices , and again their behavior is probabilistic.
A conductor is a system that has been modeled with quantum mechanics, and in the quantum mechanics of solids the electrons are not free, they are in various bound states. This link describes the quantum mechanical model of the band theory of solids:

Individual electrons are either in the conduction band or in the valence band. In the valence band the electrons are  in energy levels of atoms and molecules. The energy levels in the conduction band are occupied by electrons that are bound to the whole lattice of the conductor, but still they are bound . This means that in order to leave the solid a photon of the correct energy and higher can kick them out of the quantum level (photoelectric).
Photons of lower energy but with the correct energy difference can change the energy level of the lattice bound electron, the low energy photon interacts with the whole lattice to do that. It is the same as with a photon raising the energy level of the electron in a simple atom.The conduction band though has so close energy levels of the lattice that the electrons can be modeled to be free within it, but the individual photon electron interaction goes through changes in the occupation of lattice energy levels.
You ask in the comments:
How does this translate to motion of the electron?
A single electron does not move. It just has a probability of being "found" in a given direction and position. It is the accumulation of electrons positions that can give the motion.

i still dont understand how change in the lattice energy level correlate to direction of the electron.

If one could solve the complicated potentials of a lattice when interacting with the photon, the wavefunction would have the probability of finding a single electron in the direction of the macroscopic current that emerges as the classical theory of electricity and magnetism.

In the simple atom example you gave, absorbed photon changes the electrons wave function so where it could be found. is something similar going on

yes, the quantum models are "averaging" keeping the quantum mechanical nature of the lattice of atoms and molecules.
A: Let's talk about how a radio wave is created. Then we will be able to imagine how this kind of EM radiation affects the surface electrons on the receiver rod.
To create a radio wave, the electrons in an antenna rod are periodically moved back and forth. During each of these synchronous accelerations, polarised photons are emitted. Their electric field components are aligned parallel to the antenna rod. The magnetic field component is oriented perpendicular to it and perpendicular to the direction of emission. What we get is a rising and falling intensity (including sign change) of the two fields, caused by very very many polarised photons moving away from the source at the speed of light.
At the receiver, everything happens the other way round again. The incident (polarised!) photons cause the Lorentz force and their energy is converted into kinetic energy of the electrons. The electrons move back and forth synchronously with the radio wave. The photons are absorbed by the electrons in the process.
To put it very clearly, the frequency of the emitted photons depends on the electrical voltage of the source and the electrical resistance of the rod material. The frequency of the radio wave, on the other hand, depends on the frequency of the wave generator.
At the receiver, different radio sources cause overlapping accelerations of the surface electrons. Plus a noise of the other incoming photons. The task of the receiver electronics is to filter out the desired carrier frequency (and then decode the imprinted information).
