Resumo

AHADPOUR, S.  e  MIRMASOUDI, F.. The role of noisy channels in quantum teleportation. Rev. mex. fis. [online]. 2020, vol.66, n.3, pp.378-387.  Epub 26-Mar-2021. ISSN 0035-001X.  https://doi.org/10.31349/revmexfis.66.378.

In quantum information theory, the effects of quantum noise on teleportation are undeniable. Hence, we investigate the effect of noisy channels including amplitude damping, phase damping, depolarizing and phase flip on the teleported state between Alice and Bob where they share an entangled state by using atom-field interaction state. We analyze the fidelity and quantum correlations as a function of decoherence rates and time scale of a state to be teleported. We observe that the average fidelity and quantum correlations accurately depend on types of noise acting on quantum channels. It is found that atom-field interaction states are affected by amplitude damping channel are more useful for teleportation than when the shared qubits are affected by noisy channels such as AD channel and phase flip. We also observe that if the quantum channels are subject to phase flip noise, the average fidelity reproduces initial quantum correlations to possible values. On the other hand, not only all the noisy quantum channels do not always destroy average fidelity but also they can yield the highest fidelity in noisy conditions. In the current demonstration, our results provide that the average fidelity can have larger than 2/3 in front of the noise of named other channels with increasing decoherence strength. Success in quantum states transfer in the present noise establishes the importance of studying noisy channels.

Palavras-chave : Quantum noise on teleportation; quantum correlations; 03.67.-a; 03.65.Ta; 03.65.Ud.

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