静止铁电体中的移动类视界
Moving Analogue Horizons in Stationary Ferroelectrics
AI总结：
该研究提出铁电材料中极化梯度刚度的行波调制可产生移动类视界，为类引力研究提供了实验可控的新平台。
AI中文摘要：
我们表明，铁电材料中极化梯度刚度的行波调制会在其集体极化动力学中诱导出有效流。在可控局域近似下，小极化涨落（即铁子）满足带流的有质量克莱因-戈登方程。与常规类引力平台不同，该有效流源于材料参数的调制，而非介质的物理输运。此机制可产生移动类视界，将亚铁子区域与超铁子区域分隔开，超铁子区域支持负范数反铁子模式。这些模式与正范数铁子的耦合会产生类超辐射放大，而有效质量间隙可通过外电场独立调控。因此，铁电系统为研究带质量标量激发的类引力提供了一种新颖且实验可控的平台。
英文摘要：
We show that a traveling modulation of the polarization-gradient stiffness in a ferroelectric material induces an effective flow in its collective polarization dynamics. Within a controlled local approximation, small polarization fluctuations, or ferrons, obey a massive Klein-Gordon equation with flow. Unlike conventional analogue-gravity platforms, the effective flow originates from the modulation of the material parameters rather than from the physical transport of the medium. This mechanism enables mobile analogue horizons separating sub-ferronic and super-ferronic regions, the latter supporting negative-norm antiferron modes. Their coupling to positive-norm ferrons gives rise to superradiant-like amplification, while the effective mass gap can be tuned independently through an external electric field. Ferroelectric systems therefore provide a novel and experimentally controllable platform for analogue gravity with massive scalar excitations.
