论文标题
固态电子自旋中自旋寿命的极限
The limit of spin lifetime in solid-state electronic spins
论文作者
论文摘要
量子技术的旋转量矩形的开发需要保护其远离有限温度的反应的主要来源：原子振动。在这里，我们通过提供完整的旋转放松图片，其中最多包括两次旋转过程，从而消除了该领域进步的主要障碍之一。我们的方法基于机器学习和电子结构理论，并使在现实系统中的旋转寿命预测可行。我们研究了一个典型的基于钒的分子值，并揭示高温下的自旋寿命受拉曼过程的限制，这是由于少量THZ的分子内振动。这些发现有效地改变了对这类材料中自旋松弛的常规理解，并开放了新的途径，以实现悠久的旋转系统的理性设计。
The development of spin qubits for quantum technologies requires their protection from the main source of finite-temperature decoherence: atomic vibrations. Here we eliminate one of the main barriers to the progress in this field by providing a complete first-principles picture of spin relaxation that includes up to two-phonon processes. Our method is based on machine learning and electronic structure theory and makes the prediction of spin lifetime in realistic systems feasible. We study a prototypical vanadium-based molecular qubit and reveal that the spin lifetime at high temperature is limited by Raman processes due to a small number of THz intra-molecular vibrations. These findings effectively change the conventional understanding of spin relaxation in this class of materials and open new avenues for the rational design of long-living spin systems.
