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Quantum correlations generation and distribution in a universal covariant quantum cloning circuit

Xi-Jun Ren

Science China Information SciencesApr 1, 20171 citation

Quantum correlations support probabilistic pure state cloning

Luis Roa, M. Alid-Vaccarezza, Cristian Ignacio Jara-Figueroa +1 more

Physics Letters AFeb 1, 20147 citations

A Possible Origin of Quantum Correlations

Aleksandr V. Belinsky, Michael H. Shulman

arXiv:1808.10271Journal of Russian Laser ResearchMay 1, 20173 citations

The roles of quantum correlations in quantum cloning

Jun Zhang, Shao-xiong Wu, Chang-shui Yua

In this paper, we study the entanglement and quantum discord of the output modes in the unified 1 → 2 state-dependent cloning and probabilistic quantum cloning. The tripartite entanglement among the output modes and the quantum cloning machine is also considered. We find that the roles of the quantum correlations including the bipartite and tripartite entanglement and quantum discord strongly depend on the quantum cloning machines as well as the cloned state. In particular, it is found that this quantum cloning scheme can be realizable even without any quantum correlation.In this paper, we study the entanglement and quantum discord of the output modes in the unified 1 → 2 state-dependent cloning and probabilistic quantum cloning. The tripartite entanglement among the output modes and the quantum cloning machine is also considered. We find that the roles of the quantum correlations including the bipartite and tripartite entanglement and quantum discord strongly depend on the quantum cloning machines as well as the cloned state. In particular, it is found that this quantum cloning scheme can be realizable even without any quantum correlation.

Aug 17, 20160 citations

Complementarity of quantum correlations in cloning and deleting of quantum states

Sk Sazim, Indranil Chakrabarty, Annwesha Datta +1 more

We quantify the amount of correlation generated between two different output modes in imperfect cloning and deletion processes. We use three different measures of quantum correlations and investigate their role in determining the fidelity of cloning and deletion. We obtain a bound on the total correlation generated in the successive processes of cloning and deleting operations. This bound displays a different kind of complementary relationship between the quantum correlations required in generating a copy of a quantum state and the amount of correlation required to bring it back to the original state by deleting and vice versa. Our result shows that the better we clone (delete) a state, the more difficult it will be to bring the state back to its original form by the process of deleting (cloning).We quantify the amount of correlation generated between two different output modes in imperfect cloning and deletion processes. We use three different measures of quantum correlations and investigate their role in determining the fidelity of cloning and deletion. We obtain a bound on the total correlation generated in the successive processes of cloning and deleting operations. This bound displays a different kind of complementary relationship between the quantum correlations required in generating a copy of a quantum state and the amount of correlation required to bring it back to the original state by deleting and vice versa. Our result shows that the better we clone (delete) a state, the more difficult it will be to bring the state back to its original form by the process of deleting (cloning).

arXiv:1308.4340Physical Review AJun 9, 20158 citations

On the Entanglement Structure in Quantum Cloning

Dagmar Bruß, Chiara Macchiavello

arXiv:quant-ph/0212059Foundations of PhysicsOct 24, 200327 citations

The roles of quantum correlations in quantum cloning

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