Definition for "Spontaneous Emission" in the Quantum Dictionary

- Modern Physics -

Quantum Mechanics Dictionary

A quantum mechanics concept defining a model element, mathematical object, or experimental method used to predict measurable outcomes. It applies when required assumptions and definitions are specified and yields computable probabilities and expectation values. It does not ensure correctness without validation of approximations, numerical stability, and consistency of units and conventions.

Natural & Formal Sciences Dictionary

The quantum process by which an excited system (atom, molecule, quantum dot, etc.) transitions to a lower energy state and emits a photon without any externally supplied stimulating photon, producing radiation with statistical phase and timing properties determined by the system–reservoir coupling.