论文标题
质量不同
Superradiance in massive vector fields with spatially varying mass
论文作者
论文摘要
超高是一个过程，通过该过程，大量的骨颗粒可以从旋转黑洞中提取能量，如果粒子具有与黑洞的Schwarzschild半径相当的compton波长，则会导致“云”的堆积。一种有趣的可能性是，在弥漫性等离子体中，光子可能会出现超高，在那里它们获得了少量的有效质量。对Spin-0病例的研究表明，这种堆积被空间变化的有效质量抑制，可以模仿光子与物理逼真的等离子体密度谱的相互作用。我们对Kerr背景上的大规模Proca场进行相对论模拟，并进行了修改，以说明有效质量的空间变化。这使我们能够治疗与光子直接相关的自旋-1病例，并研究血浆中较薄的磁盘轮廓的效果。我们发现与标量案例相似的定性结果，因此支持这项工作的结论：恒定的渐近质量或类似壳的等离子体结构才能实现超级增长的发生。我们研究薄磁盘并发现抑制其生长的超级云的泄漏，得出结论，厚磁盘更有可能支持不稳定。
Superradiance is a process by which massive bosonic particles can extract energy from spinning black holes, leading to the build up of a "cloud" if the particle has a Compton wavelength comparable to the black hole's Schwarzschild radius. One interesting possibility is that superradiance may occur for photons in a diffuse plasma, where they gain a small effective mass. Studies of the spin-0 case have indicated that such a build up is suppressed by a spatially varying effective mass, supposed to mimic the photons' interaction with a physically realistic plasma density profile. We carry out relativistic simulations of a massive Proca field evolving on a Kerr background, with modifications to account for the spatially varying effective mass. This allows us to treat the spin-1 case directly relevant to photons, and to study the effect of thinner disk profiles in the plasma. We find similar qualitative results to the scalar case, and so support the conclusions of that work: either a constant asymptotic mass or a shell-like plasma structure is required for superradiant growth to occur. We study thin disks and find a leakage of the superradiant cloud that suppresses its growth, concluding that thick disks are more likely to support the instability.
