Last Updated:2025/11/26
(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.
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von Neumann entropy
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von Neumann entropy
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Noun
Japanese Meaning
量子状態のエントロピー。状態が量子密度行列 𝜌 で表現される場合、このエントロピーは S=-tr(𝜌 log 𝜌) の形で計算される。