Written by the Fiveable Content Team • Last updated September 2025
Verified for the 2026 exam
Verified for the 2026 exam•Written by the Fiveable Content Team • Last updated September 2025
Definition
Quantum tunneling refers to when particles move through a barrier that they theoretically shouldn't be able to pass according to classical physics, due solely to quantum mechanical phenomena.
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.