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States
... and intuitive mathematical notation to describe quantum states, known as bra-ket notation . Basis states Any quantum state ∣ ψ ⟩ can be expressed in terms of a ...
Wiki article - Anonymous (not verified) - 26/10/2015 - 17:56 - 0 comments
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Bipartite states and Schmidt decomposition
Bipartite states are one of the basic objects in Quantum Information Theory and will be defined in what follows: Pure States Definition Let H = H A ⊗ H B be a ... is useful for the separability characterization of pure states: The state ∣ ψ ⟩ A B is separable if and ...
Wiki article - Anonymous (not verified) - 04/03/2019 - 00:51 - 0 comments
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Entanglement
... where the joint state cannot be written as a product of states of its component systems. Erwin Schrödinger coined the word ... ψ ⟩ A ⊗ ∣ ϕ ⟩ B . States of the composite system which can be represented in this form are called ...
Wiki article - Anonymous (not verified) - 26/10/2015 - 17:56 - 0 comments
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Matrix product states
Matrix product states are one possible way of describing a quantum state. In general, this ... However, there are several special cases, such as cluster states and the AKLT model which have exact decompositions in terms of these states, and other cases, such as translationally invariant states which can be ...
Wiki article - Anonymous (not verified) - 26/10/2015 - 17:56 - 0 comments
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Multipartite entanglement
... subsystems the definition of separable and entangled states is richer than in the bipartite case. Indeed, in the multipartite case, apart from fully separable and fully entangled states, there also exists the notion of partial separability . Full and ...
Wiki article - Anonymous (not verified) - 26/10/2015 - 17:56 - 0 comments
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Separable and entangled states
... be written as a probability distribution over uncorrelated states, product states, ρ = ∑ i p i ρ i A ...
Wiki article - Anonymous (not verified) - 26/10/2015 - 17:56 - 0 comments
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Singlet states
... = General discussion = In quantum mechanics, the singlet states can be defined in different ways. One of them, which is rather ... for n odd), however the according space of singlet states has dimensionality N ( n ) ≠ 1 but equal to the ...
Wiki article - Anonymous (not verified) - 26/10/2015 - 17:56 - 0 comments
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Bell states and Bell-diagonal states
REDIRECT Bell state 1051 reads Last modified: Monday, October 26, 2015 - 17:56
Wiki article - Anonymous (not verified) - 26/10/2015 - 17:56 - 0 comments
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Distance measures between states
... of introducing a notion of distance between two quantum states. In general, a distance measure quantifies the extent to which two quantum states behave in the same way. While these distance measures are usually given ...
Wiki article - Anonymous (not verified) - 26/10/2015 - 17:56 - 0 comments
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Bloch sphere
... between elements of the Bloch sphere and pure states can be explicitly given. thumb To show this correspondence, ... Bloch sphere, the open Bloch ball, represents the mixed states of a single qubit. The r⃗ = ( x , y , z ) ...
Wiki article - Anonymous (not verified) - 26/10/2015 - 17:56 - 0 comments