Definition for "Conserved Quantity" 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

A scalar or tensorial observable whose value is invariant under the time evolution or dynamics of a closed system, remaining constant for all times in that evolution.

- Natural & Formal Sciences -

Mathematics & Logic Dictionary

A scalar, vectorial, or tensorial quantity whose value (locally or in integral form) remains constant along exact solutions of an evolution equation or dynamical system, so that it is invariant under the time evolution defined by the system.