Imagine you have a toy train that goes around a track. You have to control the train and make it stop or start at certain points on the track. This is like how a computer works, it needs to control when certain things happen.
Now, let's imagine the train tracks are made of a special material that can only conduct electricity in certain directions. This is called a superconductor. If we make a loop of this superconductor and send a current through it, the current will keep flowing forever. This is called a persistent current.
A quantum flux parametron uses this idea of a persistent current to control when things happen in a computer. Instead of a train moving around a track, we have something called a fluxon which is like a little bit of electricity that travels in one direction around a loop of superconductor.
When the fluxon reaches a part of the loop that is made of a different type of superconductor, it causes a change in the magnetic field around the loop. This change in the magnetic field can be detected and used to control other parts of the computer.
Think of it like a game of hot potato. The fluxon is the potato and each time it passes through a different part of the loop it heats up, causing something to happen. This allows us to control the flow of electricity in a computer in a very precise way.
Overall, a quantum flux parametron uses the properties of superconductors and magnetic fields to create a very efficient and precise way of controlling the flow of electricity in a computer.