论文标题
在密闭系统中非平衡镁的Bose-Einstein凝结
Bose-Einstein Condensation of Nonequilibrium Magnons in Confined Systems
论文作者
论文摘要
我们研究了纳米镜系统中室温镁棒状体冷凝物（BEC）的形成，并证明其寿命受到空间限制的影响。我们预测偶极相互作用和非线性镁散射如何有助于产生能量量化纳米镜面器件中亚稳态的BEC。我们通过对Landau-Lifshitz-Gilbert方程的完整数值模拟来验证我们的预测，并证明了在Yttrium Iron Garnet的密闭绝缘磁铁中的产生。我们直接绘制了此相变背后的非线性镁散射过程，以显示量子量化的热化通道如何允许在密闭结构中形成BEC。根据我们的结果，我们讨论了一种在纳米级系统中操纵BEC寿命的新机制。我们的研究极大地扩展了研究现实系统中Magnon BEC的动态的自由，并在室温下为基于BEC的应用设计集成电路。
We study the formation of a room temperature magnon Bose-Einstein condensate (BEC) in nanoscopic systems and demonstrate that its lifetime is influenced by the spatial confinement. We predict how dipolar interactions and nonlinear magnon scattering assist in the generation of a metastable magnon BEC in energy-quantized nanoscopic devices. We verify our prediction by a full numerical simulation of the Landau-Lifshitz-Gilbert equation and demonstrate the generation of magnon BEC in confined insulating magnets of yttrium iron garnet. We directly map out the nonlinear magnon scattering processes behind this phase transition to show how fast quantized thermalization channels allow the BEC formation in confined structures. Based on our results, we discuss a new mechanism to manipulate the BEC lifetime in nanoscaled systems. Our study greatly extends the freedom to study the dynamics of magnon BEC in realistic systems and to design integrated circuits for BEC-based applications at room temperature.
