Quantum dense coding over Bloch channels

Details Quantum dense coding over Bloch channels Quantum dense coding over Bloch channels

2010-07-08

arxiv.org/abs/1007.1446v1

J. Phys. A :Math. Theor. 44 055305 (2011)

Physics

Quantum Physics

Scientific paper

Dynamics of coded information over Bloch channels is investigated for different values of the channel's parameters. We show that, the suppressing of the travelling coded information over Bloch channel can be increased by decreasing the equilibrium absolute value of information carrier and consequently decreasing the distilled information by eavesdropper. The amount of decoded information can be improved by increasing the equilibrium values of the two qubits and decreasing the ratio between longitudinal and transverse relaxation times. The robustness of coded information in maximum and partial entangled states is discussed. It is shown that the maximum entangled states are more robust than the partial entangled state over this type of channels.

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