unitarity
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English[edit]
Etymology[edit]
Noun[edit]
unitarity (countable and uncountable, plural unitarities)
- The quality or state of being unitary.
- 1993, George Sterman, An Introduction to Quantum Field Theory, page 334:
- 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.
Usage notes[edit]
- (quality or state): The synonymous noun unitariness exists as well, but unitarity and unitariness are each preferred (at least partly) in different fields. Overall, unitarity is more common than unitariness.
Derived terms[edit]
Translations[edit]
representation by a unitary operator
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