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What is Von Neumann Entropy in Mixed States about?

The document discusses the application of the Araki-Lieb inequality to calculate the von Neumann entropy for mixed states, specifically in the context of a two-level atom interacting with a quantized field. It presents a method to derive the entropy of a mixed state by introducing a virtual multi-level atom, allowing the use of the Araki-Lieb inequality even when one subsystem is in a mixed state. The findings are exemplified through the Jaynes-Cummings model, demonstrating the relationship between the atom

Author

Georgia Tampakologou

Language

EN