Quantum probability is a core principle of quantum mechanics, highlighting the probabilistic nature of quantum systems. Unlike classical physics, which provides deterministic outcomes, quantum systems are described by probabilities.
At the quantum level, particles such as electrons or photons do not have fixed properties until measured. Instead, they exist in superpositions of multiple states, each with an associated probability amplitude.
When a measurement is made, the quantum system "collapses" into one of these possible states with probabilities determined by the square of the amplitude. This inherent uncertainty and probabilistic behavior challenge classical intuitions but underpin the remarkable features of quantum mechanics.
Quantum probability plays a crucial role in understanding the behavior of particles, quantum entanglement, and the predictions of quantum theory.