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Quantum Dense Coding About a Two-Qubit Heisenberg XYZ Model
Ist Teil von
International journal of theoretical physics, 2017-09, Vol.56 (9), p.2803-2810
Ort / Verlag
New York: Springer US
Erscheinungsjahr
2017
Quelle
Alma/SFX Local Collection
Beschreibungen/Notizen
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.