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Von Neumann entropy
The von Neumann entropy of a quantum state ρ is given by the formula, ... λ i are the eigenvalues of ρ then the Von Neumann entropy can be reexpressed as: S( ρ ) = − ∑ ...
Wiki article - Anonymous (not verified) - 26/10/2015 - 17:56 - 0 comments
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Entropy of entanglement
... for a bipartite pure states . It is defined as the von Neumann entropy of one of the reduced states . That is, for a pure ...
Wiki article - Anonymous (not verified) - 26/10/2015 - 17:56 - 0 comments
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Linear entropy
... The linear entropy is an approximation to the Von Neumann entropy S , which is defined as $$S \, \dot= \, ... get the second to last equality. The linear entropy and Von Neumann entropy are similar measures of the mixedness of a state, although ...
Wiki article - Anonymous (not verified) - 26/10/2015 - 17:37 - 0 comments
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The Holevo bound
... i S ( ρ i ) where S is the von Neumann entropy . By convexity of the von Neumann entropy, the Holevo ...
Wiki article - Anonymous (not verified) - 18/08/2020 - 15:00 - 0 comments
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Accessible information
... X S ( ρ X ), where S is the von Neumann entropy . By substituting the von Neumann entropy in the ...
Wiki article - Anonymous (not verified) - 26/10/2015 - 17:56 - 0 comments
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Quantum mutual information
... from ρ A B . S ( A B ) is the Von Neumann entropy of the total state. The quantity is formally equivalent ...
Wiki article - Anonymous (not verified) - 26/10/2015 - 17:56 - 0 comments
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Coherent information
... S ( A B ) where S ( B ) is the Von Neumann entropy of the output state ρ B and S ( A ...
Wiki article - Anonymous (not verified) - 26/10/2015 - 17:56 - 0 comments
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Subentropy
... of a quantum state is defined similarly to the von Neumann entropy , as $$Q(\rho) = -\sum_{k=1}^n \left( \prod_{l ...
Wiki article - Anonymous (not verified) - 26/10/2015 - 17:56 - 0 comments
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Entanglement
... pure state . Another way to say this is that while the von Neumann entropy of the whole state is zero (as it is for any pure state), ...
Wiki article - Anonymous (not verified) - 26/10/2015 - 17:56 - 0 comments
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Quantum information
... needed to faithfully transmit these states is given by von Neumann entropy S ( ρ ) = − T r ρ log ...
Wiki article - JMiszczak - 26/10/2015 - 17:56 - 0 comments