Quantum dense coding over Bloch channels

TL;DR

This paper investigates how quantum dense coding behaves over Bloch channels, showing how channel parameters affect information suppression, robustness, and potential improvements in decoded information.

Contribution

It introduces an analysis of coded information dynamics over Bloch channels, highlighting how channel parameters influence information robustness and security in quantum communication.

Findings

Suppression of coded information can be reduced by decreasing the equilibrium absolute value of information carriers.

Increasing the equilibrium values of qubits enhances decoded information.

Maximum entangled states are more robust than partial entangled states over Bloch channels.

Abstract

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.