I'm thinking about photons of low frequency as would be produced by a radio transmitter. How would a transmitter have to be set up to transmit just one photon? The smallest transmission I can think of would be to move 1 electron from one end of the antenna to the other. I would think that would produce at least 2, one as the electron accelerated and another as it decelerated to a stop. Am I thinking about this correctly at all?