Decoherence Theory

Decoherence Theory explains how quantum systems lose their quantum behavior when interacting with their environment. In the quantum world, particles can exist in multiple states at once (superposition). However, when they interact with surrounding particles or systems, this superposition breaks down, causing the system to behave more classically, like everyday objects. Decoherence doesn't collapse the quantum state but instead makes the outcomes of quantum experiments appear definite and predictable, which helps to explain why we observe a classical reality despite the underlying quantum nature of the universe.