Quantum Decoherence

Quantum decoherence is the process by which quantum systems lose their unique quantum properties, such as superposition, and start behaving more classically due to interactions with their environment. In matrix mechanics and quantum information theory, this means that a quantum state, initially a complex combination of possibilities, becomes entangled with external factors (like particles or fields). As a result, we observe definite outcomes rather than probabilistic ones, effectively "collapsing" the quantum state. Decoherence helps explain why we experience a classical world, despite the underlying quantum nature of reality.