论文标题
量子障碍的范式转移：纵向模式的软化
Paradigm shift for quantum paraelectric: softening of longitudinal modes
论文作者
论文摘要
我们重新审视了从副电态到铁电状态的量子相变，尤其是纵向模式之间的广泛区别以横向一种。与在有限温度下的过渡相反，对于打破离散对称性的量子相跃迁，模式之间的分裂是无关的。我们表明，与经典过渡相比，在量子相变的背景下，各向异性会导致不同的行为，并提出了一个实验来观察它。结果对于解释钛酸标中的配对机制至关重要。
We revisit the quantum phase transition from a paraelectric state to a ferroelectric one and in particular the widespread distinction between a longitudinal modes to transverse one. In contrast to transitions at finite temperature, for a quantum phase transition breaking a discrete symmetry the splitting between the modes is irrelevant. We show that an anisotropy in the context of a quantum phase transition leads to a different behavior, compared to a classical transition, and suggest an experiment to observe it. The result is essential for explaining the pairing mechanism in strontium titanate.
