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Density matrix
A density matrix , or density operator , is used in quantum theory to describe the statistical ...
Wiki article - Anonymous (not verified) - 08/09/2020 - 13:08 - 0 comments
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States
... with some quantum numbers fixed, can be described by a density operator . Paul A. M. Dirac invented a powerful and intuitive ... distribution of pure states, or mixed state , the density operator (or density matrix), ρ , is used. This extends ...
Wiki article - Anonymous (not verified) - 26/10/2015 - 17:56 - 0 comments
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Density operator
REDIRECT Density matrix 1020 reads Last modified: Monday, October 26, 2015 - 17:56
Wiki article - JMiszczak - 26/10/2015 - 17:56 - 0 comments
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Bloch sphere
... quantum register is 2 m +1 − 2. The geometry of density operators Formulations of quantum mechanics in terms of pure ...
Wiki article - Anonymous (not verified) - 26/10/2015 - 17:56 - 0 comments
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NMR
... and probably not possible. But there's an alternative: the density operator . The density operator makes it possible do describe the ...
Wiki article - Anonymous (not verified) - 26/10/2015 - 17:56 - 0 comments
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Squashed entanglement
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Wiki article - Anonymous (not verified) - 26/10/2015 - 17:56 - 0 comments
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Superfidelity
... Superfidelity is a measure of similarity between density operator s. It is defined as $G(\rho,\sigma) = ...
Wiki article - Anonymous (not verified) - 26/10/2015 - 17:56 - 0 comments
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Channel (CP map)
... 1 ) → S (H 2 ) mapping states ( i.e. density operators) on some Hilbert space H 1 to states on some ... to positive operators, so that $T(\varrho)$ is a valid density operator for any input density operator $\varrho$ . Finally, these ...
Wiki article - Anonymous (not verified) - 26/10/2015 - 17:56 - 0 comments
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Mixed states
... orthogonal. This is the spectral decomposition of the density operator. In the Bloch sphere this is the decomposition into antipodes. ...
Wiki article - Anonymous (not verified) - 26/10/2015 - 17:56 - 0 comments
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Enhancement of channel capacities with entanglement
... both the Hilbert space of the quantum system and the set of density operators on that system. Thus, a quantum channel N: A ... averaging over them implements the constant map: for all density operators ρ , \frac{1}{d_{A'}^{2n}} ... since U j does not change the local density operator on A ʹ n . On the other hand, if Alice ...
Wiki article - Anonymous (not verified) - 26/10/2015 - 17:56 - 0 comments