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von Neumann entropy

/vɔn ˈnoɪ.mən ˈɛn.tɹə.pi/

von Neumann entropy noun: 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.

Noun

von Neumann entropy

  1. (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.

Origin of von Neumann entropy

Named after John von Neumann.

Questions about von Neumann entropy

What does von Neumann entropy mean?
Von Neumann entropy means 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.
What part of speech is von Neumann entropy?
Von Neumann entropy is a noun.
How do you pronounce von Neumann entropy?
Von Neumann entropy is pronounced /vɔn ˈnoɪ.mən ˈɛn.tɹə.pi/.

Words near von Neumann entropy in the dictionary

  1. von Mangoldt function
  2. von Monakow's tract
  3. von Neumann
  4. von Neumann architecture
  5. von Neumann architectures
  6. von Neumann entropy
  7. von Neumann machine
  8. von Neumann machines
  9. von Neumann neighborhood
  10. von Neumann neighborhoods
  11. von Neumann neighbourhood

Source and license

Adapted from Wiktionary: von Neumann entropy (page history and authors). Text available under the Creative Commons Attribution-ShareAlike 4.0 license. Word.ws reformatted the entry and added links. Wiktionary data of 2026-09-02.

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