Unitarity

noun

noun ·Rare ·Advanced level

Definitions

Noun
  1. 1
    The quality or state of being unitary. countable, uncountable

    "In this section, we shall prove the gauge invariance and unitarity of the physical S-matrix in quantum electrodynamics, to all orders in the renormalized perturbation theory."

Example

More examples

"In this section, we shall prove the gauge invariance and unitarity of the physical S-matrix in quantum electrodynamics, to all orders in the renormalized perturbation theory."

Etymology

From unitary + -ity.

Related phrases

unitarity operatorunitarity triangle

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Data sourced from Wiktionary, WordNet, CMU, and other open linguistic databases. Updated March 2026.