unitarity

noun

uni·​tar·​i·​ty

ˌyünə̇ˈtarətē,

-ter-

plural -es

: the requirement in quantum mechanics that the S matrix be a unitary transformation between initial and final states of motion

The Ultimate Dictionary Awaits

Expand your vocabulary and dive deeper into language with Merriam-Webster Unabridged.

1. Expanded definitions
2. Detailed etymologies
3. Advanced search tools
4. All ad-free

Discover what makes Merriam-Webster Unabridged the essential choice for true word lovers.

Start Your Free Trial Now