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A specification, relative to a theory, sufficient to determine probabilities or allowed future behavior for the observables represented by that theory.
Classical states are commonly points in phase space; quantum states are rays or density operators on a Hilbert space.
wp-physics-physical_statenlab-physics-statenist-quantum-theoryEach relation below ends at this concept.
This is an authored directed relation from the source endpoint to the target endpoint.
A physical theory assigns a space of allowed states to a selected physical system; the same system may admit different state descriptions in different effective theories.
The target represents a state, property, observable, or state-dependent description associated with the source system or theory.
nist-quantum-theorywp-physics-physical_statenlab-physics-statewp-physics-physical_systemnlab-physics-physical_systemEach relation below starts at this concept.
This is an authored directed relation from the source endpoint to the target endpoint.
A state determines or constrains the probability distribution of observables represented by the theory.
The target represents a state, property, observable, or state-dependent description associated with the source system or theory.
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