von Neumann entropy en · NOUN
Pronunciation
- /vɔn ˈnoɪ.mən ˈɛn.tɹə.pi/
Etymology
Named after John von Neumann.
Meanings
- (qualifier:quantum mechanics) The entropy of a quantum state. If the state is expressed as a quantum density matrix ρ, then this entropy can be expressed mathematically as S=-tr(ρ log ρ) where tr is the trace operator and the logarithm is natural.