quantum state
noun Physics.
the condition in which a physical system exists, usually described by a wave function or a set of quantum numbers.
Origin of quantum state
First recorded in 1920–25
Words nearby quantum state
British Dictionary definitions for quantum state
quantum state
noun
physics
a state of a system characterized by a set of quantum numbers and represented by an eigenfunction. The energy of each state is precise within the limits imposed by the uncertainty principle but may be changed by applying a field of force. States that have the same energy are called degenerate
See also energy level
Scientific definitions for quantum state
quantum state
A description in quantum mechanics of a physical system or part of a physical system. Different quantum states for a physical system show discrete differences in the value of the variables used to define the state. For example, the spin of an isolated electron can take on one of only two values; there are no other quantum states available for the electron and no intermediate values, since spin is quantized. The quantum state is sometimes described by a set of quantum numbers that pick out the appropriate values for describing the state.