We investigate two quantum communication protocols of dense coding and teleportation based on two coupled quantum dot molecules under intrinsic decoherence, tunneling rates, and Coulomb coupling interaction. In addition, due to the importance of estimating the initial phase, we monitor the initial quantum phase of the teleportation, which may have information encoded in it, using a family of quantum statistical speeds, especially quantum Fisher information and Hilbert–Schmidt speed. Moreover, we compare the results between single and two-qubit teleportations, such that the superiority of single-qubit teleportation in the current model can be obvious. The assumed scheme’s various parameters help us improve quantum dense coding, teleportation, and phase estimation in the current model. Furthermore, we reveal that the tools discussed in this paper can all provide witnessing non-Markovian dynamics.

我们研究了基于两个耦合量子点分子在固有退相干、隧道速率和库仑耦合相互作用下的密集编码和隐形传态的两种量子通信协议。此外，由于估计初始相位的重要性，我们使用一系列量子统计速度，特别是量子费希尔信息和希尔伯特-施密特速度来监测隐形传态的初始量子相位，其中可能包含编码信息。此外，我们比较了单量子位隐形传态和两个量子位隐形传态的结果，因此当前模型中单量子位隐形传态的优越性是显而易见的。假设方案的各种参数有助于我们改进当前模型中的量子密集编码、隐形传态和相位估计。此外，我们发现本文讨论的工具都可以提供见证的非马尔可夫动态。