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Relative entropy of states in a two $$q$$-bit system. (English) Zbl 1071.81507
Doebner, H.-D. (ed.) et al., Quantum theory and symmetries. Proceedings of the international symposium held in Goslar, Germany, July 18–22, 1999. Singapore: World Scientific (ISBN 981-02-4237-9). 412-417 (2000).
For the entire collection see [Zbl 0944.00084].
##### MSC:
 81P15 Quantum measurement theory, state operations, state preparations 82B10 Quantum equilibrium statistical mechanics (general) 94A17 Measures of information, entropy