Last Updated
：2025/11/26
von Neumann entropy
IPA(Pronunciation)
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。
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(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
Calculating the von Neumann entropy of a mixed quantum state requires diagonalizing its density matrix to evaluate S = -tr(ρ log ρ).
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Calculating the von Neumann entropy of a mixed quantum state requires diagonalizing its density matrix to evaluate S = -tr(ρ log ρ).
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