What is the Principle of Superposition in Quantum Mechanics?

The principle of superposition in quantum mechanics states that a physical system exists in all of its theoretically possible states simultaneously, until it is measured. This means that, for example, an electron can be in multiple positions at the same time. However, when a measurement is taken, the system collapses into one of the possible states. This concept is essential in understanding the behavior of subatomic particles and is a fundamental aspect of quantum physics. It has significant implications for the development of quantum computing and other advanced technologies.