纯退相下三方态的与基矢无关的相干动力学
Basis-Independent Coherence Dynamics of Tripartite States under Pure Dephasing
- Techno Main Salt Lake (Engg. Colg.), Techno India Group（印度技术集团萨尔塔莱克工程学院）
机构由 AI 辅助整理，请以论文原文为准。
AI总结：
研究三方态在纯退相环境下与基矢无关的相干动力学，通过分析马尔可夫和非马尔可夫区域中局部与共同退相的影响，揭示相干性变化规律，表明该相干度量更具弹性，为开放量子系统相干保持提供新见解及强大量子资源。
AI中文摘要：
量子相干是一种基本的量子资源，其在环境相互作用下的保持对于量子信息处理至关重要。虽然大多数研究集中在与基矢有关的相干度量上，但由与基矢无关的度量所量化的内在相干动力学在很大程度上仍未被探索。在这项工作中，我们研究了几种具有代表性的三方纯态和混合态在马尔可夫和非马尔可夫区域中，在局部和共同退相环境下与基矢无关的量子相干动力学。我们表明，马尔可夫局部退相导致与状态相关的相干性退化，而集体退相通过无退相干扇区显著增强了相干性的保持。更重要的是，非马尔可夫环境导致纯态和混合态的相干动力学几乎冻结，这表明内在相干对退相环境具有显著的鲁棒性。与相干相对熵的度量进行比较表明，与基矢无关的相干度量比其与基矢有关的对应物表现出更大的弹性和定性不同的动力学行为。这些结果为开放量子系统中内在多体相干的保持提供了新的见解，并突出了与基矢无关的相干作为一种用于实际有噪声量子技术的强大量子资源。
英文摘要：
Quantum coherence is a fundamental quantum resource whose preservation under environmental interactions is essential for quantum information processing. While most studies have focused on basis-dependent coherence measures, the dynamics of intrinsic coherence quantified by basis-independent measures remain largely unexplored. In this work, we investigate the dynamics of basis-independent quantum coherence for several representative tripartite pure and mixed states subjected to local and common dephasing environments in both Markovian and non-Markovian regimes. We show that Markovian local dephasing leads to state-dependent coherence degradation, whereas collective dephasing significantly enhances coherence preservation through decoherence-free sectors. More importantly, non-Markovian environments give rise to nearly frozen coherence dynamics for both pure and mixed states, demonstrating the remarkable robustness of intrinsic coherence against dephasing environment. A comparison with the measure of relative entropy of coherence reveals that basis-independent coherence measure exhibits substantially greater resilience and qualitatively different dynamical behaviour than its basis-dependent counterpart. These results provide new insights into the preservation of intrinsic multipartite coherence in open quantum systems and highlight basis-independent coherence as a robust quantum resource for realistic noisy quantum technologies.
