The Von Neumann Entropy

Shenker has claimed that Von Neumann's argument for identifying the quantum mechanical entropy with the Von Neumann entropy, S(ρ) = − ktr(ρ log ρ), is invalid. Her claim rests on a misunderstanding of the idea of a quantum mechanical pure state. I demonstrate this, and provide a further explanation of Von Neumann's argument

Argument (complex analysis · Conditional quantum entropy · Entropy (arrow of time · Joint quantum entropy · Maximum entropy thermodynamics · Physics · Pure mathematics · Quantum · Quantum entanglement · Quantum mechanics · Statistical physics · Theoretical physics · Von Neumann architecture · Von Neumann entropy · Advanced Thermodynamics and Statistical Mechanics · Mathematical Physics · Mathematics · Quantum Mechanics and Applications · Statistical Mechanics and Entropy

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