noun, noun which may take the genitive case particle 'no'
real space; position space
Technical term in quantum mechanics, contrasting with momentum space (運動量空間). Used as both a noun and with の to modify other nouns.
See also: 運動量空間
In quantum mechanics, Fourier transforms are used between real space and momentum space.
When this wave function is expressed in real space, it becomes as follows.
Compound of 実 (real) and 空間 (space), likely a calque from English 'real space' in physics contexts.