1.1 Introduction to Wave Functions

In quantum mechanics, a wave function is a mathematical description of the quantum state of an isolated quantum system. The wave function is a complex-valued probability amplitude, and the probabilities for the possible results of measurements made on the system can be derived from it.

The most common symbols for a wave function are the Greek letters psi (ψ or Ψ). Wave functions are functions of space and time, and they satisfy the Schrodinger equation.