We investigate the generation of entanglement through a quantum dot molecule under the influence of vibrational phonon modes in a bias voltage junction. The molecular quantum dot system is realized by coupled quantum dots inside a suspended carbon nanotube. We consider the dynamical entanglement as a function of bias voltage and temperature by taking into account the electron-phonon interaction. In order to generate the robust entanglement between quantum dots and preserve it to reach the maximal achievable amount steadily, we introduce an asymmetric coupling protocol and apply the easy tunable bias voltage-driven field. For an oscillating bias voltage, the time-varying entanglement can periodically reach the maximum revival. In thermal entanglement dynamics, the phenomena of thermal entanglement degradation and thermal entanglement revival are observed which are intensively affected by the strength of phonon decoherence. The revival of entanglement shows a larger value for a higher phonon coupling.

我们研究了在偏压结中振动声子模式的影响下通过量子点分子产生纠缠的情况。分子量子点系统是通过在悬浮的碳纳米管内耦合量子点来实现的。通过考虑电子-声子相互作用，我们将动态纠缠视为偏置电压和温度的函数。为了在量子点之间产生强大的纠缠并保持其稳定地达到最大可实现量，我们引入了一种非对称耦合协议并应用了简单的可调偏置电压驱动场。对于振荡偏置电压，时变纠缠可以周期性地达到最大恢复。在热纠缠动力学中，观察到受声子退相干强度强烈影响的热纠缠退化和热纠缠恢复现象。纠缠的恢复显示了更高声子耦合的更大值。