complementarity principle

E323045

The complementarity principle is a foundational quantum mechanics concept stating that objects like electrons or photons exhibit mutually exclusive properties (such as wave-like and particle-like behavior) that can only be observed in different experimental setups, yet together provide a complete description of the system.

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Label Occurrences
complementarity principle canonical 2

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Statements (48)

Predicate Object
instanceOf concept in quantum mechanics ⓘ
interpretive principle in physics ⓘ
physical principle ⓘ
appliesTo electrons ⓘ
other quantum particles ⓘ
photons ⓘ
associatedWith Copenhagen interpretation of quantum mechanics ⓘ
clarifiedBy Mach–Zehnder interferometer experiments ⓘ
delayed-choice experiments ⓘ
double-slit experiment ⓘ
quantum eraser experiments ⓘ
contrastsWith classical physics description of objects having simultaneously well-defined properties ⓘ
coreIdea context-dependence of physical properties ⓘ
mutual exclusivity of experimental arrangements ⓘ
wave–particle duality ⓘ
debatedBy Albert Einstein ⓘ
debatedIn Bohr–Einstein debates ⓘ
discussedIn Bohr’s 1928 paper “The Quantum Postulate and the Recent Development of Atomic Theory” ⓘ
expressedThrough trade-offs between knowledge of complementary observables ⓘ
field quantum mechanics ⓘ
formalizedBy Bohr’s writings after the 1927 Solvay Conference ⓘ
formulatedBy Niels Bohr ⓘ
hasStatus foundational principle in standard quantum theory ⓘ
implies measurement context affects which properties can be meaningfully ascribed ⓘ
no single experimental arrangement can reveal all complementary properties simultaneously ⓘ
influenced development of the Copenhagen interpretation ⓘ
philosophy of science debates about realism and empiricism ⓘ
influencedBy Niels Bohr’s philosophical views on observation ⓘ
inModernView understood in terms of quantum information and measurement theory ⓘ
involvesPropertyPair interference visibility ⓘ
momentum ⓘ
particle-like behavior ⓘ
position ⓘ
wave-like behavior ⓘ
which-path information ⓘ
mathematicallyLinkedTo non-commuting observables ⓘ
oftenExpressedAs “wave and particle pictures are complementary, not contradictory” ⓘ
philosophicalAspect epistemological limitation on descriptions of quantum systems ⓘ
rejection of classical realism for all properties simultaneously ⓘ
relatedConcept duality relations between which-path information and interference visibility ⓘ
quantum contextuality ⓘ
relatedTo Heisenberg uncertainty principle ⓘ
requires different experimental setups to reveal different properties ⓘ
scope applies to quantum systems, not classical macroscopic objects ⓘ
statedAs certain physical properties are mutually exclusive yet jointly necessary for a complete description of a system ⓘ
teachingExample electron diffraction through a crystal ⓘ
single-photon interference experiments ⓘ
yearProposed 1927 ⓘ

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Referenced by (2)

Full triples — surface form annotated when it differs from this entity's canonical label.

Niels Bohr → knownFor → complementarity principle ⓘ
subject linked to: Nicholas Baker