Wave-Particle Duality:This principle in quantum mechanics suggests that all particles also have properties of waves, which is why they can "tunnel" through barriers.
Quantum Mechanics: The branch of physics dealing with atomic and subatomic systems, providing the framework for understanding phenomena like quantum tunneling.
Heisenberg Uncertainty Principle: A fundamental concept in quantum mechanics stating that it's impossible to simultaneously know both an electron’s position and momentum accurately - this uncertainty allows for phenomena like quantum tunneling.