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Mixture
A mixture of states is an convex combination of states, i.e. ρ = ∑ j p j ρ j ... j with probability p j . All mixed states can be written as a mixture of pure states. See also ...
Wiki article - Anonymous (not verified) - 26/10/2015 - 17:37 - 0 comments
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Reduction criterion
... criterion , that is a condition that all separable states have to satisfy and a violation of it is therefore a proof of ... A ( ρ A B ) . Then the reduction criterion states that for any separable ρ A B , two derived operators ...
Wiki article - Anonymous (not verified) - 26/10/2015 - 17:56 - 0 comments
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Quantum relative entropy
... divergence , is a measure of closeness between two states. It was defined by Denis Petz as D ( ρ ∣∣ σ ... also define a relative entropy distance to some set of states, where one minimises D ( ρ ∣∣ σ ) over all σ ...
Wiki article - Anonymous (not verified) - 12/11/2017 - 00:49 - 0 comments
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Bell basis
... + |11\rangle) \end{cases}$$ The quantum states represented by these vectors are called Bell state s and are ... See also Bell state Category:Quantum States 16005 reads Last modified: Monday, ...
Wiki article - Anonymous (not verified) - 26/10/2015 - 17:56 - 0 comments
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Entropy of entanglement
... is an entanglement measure for a bipartite pure states . It is defined as the von Neumann entropy of one of the reduced states . That is, for a pure state ρ A B ... reduce to the entropy of entanglement when evaluated on pure states. Among those are Distillable entanglement Entanglement ...
Wiki article - Anonymous (not verified) - 26/10/2015 - 17:56 - 0 comments
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Channel (CP map)
... T : S (H 1 ) → S (H 2 ) mapping states ( i.e. density operators) on some Hilbert space H 1 to states on some (possibly different) Hilbert space H 2 . Classical ...
Wiki article - Anonymous (not verified) - 26/10/2015 - 17:56 - 0 comments
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Density matrix
... operation s such as measurement , using exclusively states represented by ket vectors. In general a system is said to be in a ... reducible to a convex combination of other statistical states. In that case it is said to be in a pure state . Typical ...
Wiki article - Anonymous (not verified) - 08/09/2020 - 13:08 - 0 comments
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GHZ
... One of the most remarkable properties of the GHZ states is the fact that tracing out only one party completely destroys ... n ∖ k thumb Beside this, GHZ states maximize entanglement monotones and therefore can be called ...
Wiki article - Anonymous (not verified) - 26/10/2015 - 17:56 - 0 comments
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Entanglement of formation
... is an entanglement measure for bipartite quantum states. It is defined as E f ( ρ ) = min E p ... where the minimization is over all ensemble s of pure states E = {( p i , ∣ ψ i ⟩)} that realizes ...
Wiki article - Anonymous (not verified) - 01/03/2017 - 07:35 - 0 comments
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Quantum discord
... and successfully tested. Separable (i.e. not entangled) states were considered insufficient to implement quantum information ... put in one-to-one correspondence with entanglement for pure states, but unlike entanglement it can be nonzero for separable mixed states. ...
Wiki article - Anonymous (not verified) - 26/10/2015 - 17:56 - 0 comments