Improvement quantum teleportation via the pair coherent states

In this paper, we present two methods to improve the average fidelity in the quantum teleportation processes to teleport a coherent state via the pair coherent states. We use the measuring of the orthogonal quadrature components in the first protocol and the photon number sum and phase difference in...

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Bibliographic Details
Published in:Journal of physics. Conference series 2018-05, Vol.1034 (1), p.12004
Main Authors: Dat, Tran Quang, Duc, Truong Minh, Chuong, Ho Sy
Format: Article
Language:English
Subjects:
Accuracy
Amplitudes
Coherence
Photons
Physics
Quadratures
Quantum teleportation
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Summary:In this paper, we present two methods to improve the average fidelity in the quantum teleportation processes to teleport a coherent state via the pair coherent states. We use the measuring of the orthogonal quadrature components in the first protocol and the photon number sum and phase difference in the second. The results show that the average fidelity in the first protocol is enhanced by performing a photon number shifting at a receiver, and Fav can approach to the unit if q becomes very big. In the second protocol, the average fidelity increases with increasing the amplitude of the pair coherent states. It approaches to the unit in the limit of the big amplitude values of the pair coherent states and small of the input state. The average fidelity of both methods is greatly improved comparing with the Gabris-Agarwal protocol and it approaches to unit depending on the parameters involved.
ISSN:1742-6588
1742-6596
DOI:10.1088/1742-6596/1034/1/012004