Quantum mechanisms refer to the fundamental principles that govern the behavior of particles at the atomic and subatomic levels. These principles include concepts such as superposition, where particles can exist in multiple states simultaneously, and entanglement, where particles become interconnected in such a way that the state of one instantly influences the state of another, regardless of distance. These mechanisms challenge classical physics, which describes the macroscopic world, by introducing uncertainty and probabilistic outcomes. Quantum mechanics is essential for understanding phenomena in fields like quantum computing, quantum cryptography, and particle physics, shaping modern technology and scientific research.