Quantum Heads or Tails

The Quantum Coin: A Simple Look at the 2-State Quantum System

A simple way of picturing [a two=level] system is a coin. A coin is a single object with two sides to it. In the quantum world, the two sides of the coin would have two possible quantum states. A quantum state is a state of a quantized system that is described by a set of quantum numbers. A quantum number is a number that expresses the value of some property of a particle which occurs in the quanta