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Subject Item
dbr:Conditional_quantum_entropy
rdfs:label
Conditional quantum entropy
rdfs:comment
The conditional quantum entropy is an used in quantum information theory. It is a generalization of the conditional entropy of classical information theory. For a bipartite state , the conditional entropy is written , or , depending on the notation being used for the von Neumann entropy. The quantum conditional entropy was defined in terms of a conditional density operator by Nicolas Cerf and Chris Adami, who showed that quantum conditional entropies can be negative, something that is forbidden in classical physics. The negativity of quantum conditional entropy is a sufficient criterion for quantum non-separability.
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dbc:Quantum_mechanical_entropy
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909777
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1119168177
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dbr:Chris_Adami dbr:Jonathan_Oppenheim dbr:Nicolas_Cerf dbr:Conditional_entropy dbr:Michał_Horodecki dbr:Von_Neumann_entropy dbr:Classical_information_theory dbr:Quantum_state dbc:Quantum_mechanical_entropy dbr:Andreas_Winter dbr:Entropy_measure dbr:Mixed_state_(physics) dbr:Quantum_communication dbr:Separable_state dbr:Quantum_information_theory dbr:Coherent_information
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dbo:abstract
The conditional quantum entropy is an used in quantum information theory. It is a generalization of the conditional entropy of classical information theory. For a bipartite state , the conditional entropy is written , or , depending on the notation being used for the von Neumann entropy. The quantum conditional entropy was defined in terms of a conditional density operator by Nicolas Cerf and Chris Adami, who showed that quantum conditional entropies can be negative, something that is forbidden in classical physics. The negativity of quantum conditional entropy is a sufficient criterion for quantum non-separability. In what follows, we use the notation for the von Neumann entropy, which will simply be called "entropy".
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