Quantum Dense Coding About a Two-Qubit Heisenberg XYZ Model

By taking into account the nonuniform magnetic field, the quantum dense coding with thermal entangled states of a two-qubit anisotropic Heisenberg XYZ chain are investigated in detail. We mainly show the different properties about the dense coding capacity ( χ ) with the changes of different paramet...

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Bibliographic Details
Published in:International journal of theoretical physics 2017-09, Vol.56 (9), p.2803-2810
Main Authors: Xu, Hui-Yun, Yang, Guo-Hui
Format: Article
Language:English
Subjects:
Chain entanglement
Coding
Elementary Particles
Entangled states
Inhomogeneity
Magnetic fields
Mathematical and Computational Physics
Nonuniform magnetic fields
Physics
Physics and Astronomy
Quantum Field Theory
Quantum Physics
Theoretical
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Summary:By taking into account the nonuniform magnetic field, the quantum dense coding with thermal entangled states of a two-qubit anisotropic Heisenberg XYZ chain are investigated in detail. We mainly show the different properties about the dense coding capacity ( χ ) with the changes of different parameters. It is found that dense coding capacity χ can be enhanced by decreasing the magnetic field B , the degree of inhomogeneity b and temperature T , or increasing the coupling constant along z-axis J z . In addition, we also find χ remains the stable value as the change of the anisotropy of the XY plane Δ in a certain temperature condition. Through studying different parameters effect on χ , it presents that we can properly turn the values of B , b , J z , Δ or adjust the temperature T to obtain a valid dense coding capacity ( χ satisfies χ > 1). Moreover, the temperature plays a key role in adjusting the value of dense coding capacity χ . The valid dense coding capacity could be always obtained in the lower temperature-limit case.
ISSN:0020-7748
1572-9575
DOI:10.1007/s10773-017-3445-0