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Quantum Foundations

Qubit-portraits of qudit states and quantum correlations

arXiv
Authors: C. Lupo, V. I. Man'ko, G. Marmo

Year

2007

Paper ID

50270

Status

Preprint

Abstract Read

~2 min

Abstract Words

117

Citations

N/A

Abstract

The machinery of qubit-portraits of qudit states, recently presented, is consider here in more details in order to characterize the presence of quantum correlations in bipartite qudit states. In the tomographic representation of quantum mechanics, Bell-like inequalities are interpreted as peculiar properties of a family of classical joint probability distributions which describe the quantum state of two qudits. By means of the qubit-portraits machinery a semigroup of stochastic matrices can be associated to a given quantum state. The violation of the CHSH inequalities is discussed in this framework with some examples, we found that quantum correlations in qutrit isotropic states can be detected by the suggested method while it cannot in the case of qutrit Werner states.

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  • The machinery of qubit-portraits of qudit states, recently presented, is consider here in more details in order to characterize the presence of quantum correlations in...

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References & Citation Signals

[1] DOI https://doi.org/arXiv:0705.2405 [2] arXiv https://arxiv.org/abs/0705.2405 [3] Publisher https://arxiv.org/abs/0705.2405

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