论文标题
鹰因冷凝水的量化圆形超流量中鹰辐射的声学类似物
Acoustic analogue of Hawking radiation in quantized circular superflows of Bose-Einstein condensates
论文作者
论文摘要
我们提出了霍金辐射（HR）的仿真，通过在环形限制电势中加载的原子玻色子凝结物（BEC）中在持续电流上传播的声激励。该设置最初是作为空间均匀的设置创建的，然后切换为非均匀的配置，同时保持均匀的BEC密度。最终的设置承认了具有不同局部音速斜率的声音黑白事件视野的实现。白孔地平线附近的光滑坡度抑制了超音速区域的不稳定性。发现代表HR的声学类似物的密度密度相关函数的舌形图案受到环形构型的半径和所接受的离散声模式的数量的强烈影响。有一个最小半径可以实现HR的仿真。我们还简要讨论了物质波音黑洞的性能与量子重力中普朗克规模原始黑洞稳定性的已知难题的可能相似性。
We propose emulation of Hawking radiation (HR) by means of acoustic excitations propagating on top of persistent current in an atomic Bose-Einstein condensate (BEC) loaded in an annular confining potential. The setting is initially created as a spatially uniform one, and then switches into a nonuniform configuration, while maintaining uniform BEC density. The eventual setting admits the realization of sonic black and white event horizons with different slopes of the local sound speed. A smooth slope near the white-hole horizon suppresses instabilities in the supersonic region. It is found that tongue-shaped patterns of the density-density correlation function, which represent the acoustic analog of HR, are strongly affected by the radius of the ring-shaped configuration and number of discrete acoustic modes admitted by it. There is a minimum radius that enables the emulation of HR. We also briefly discuss a possible similarity of properties of the matter-wave sonic black holes to the known puzzle of the stability of Planck-scale primordial black holes in quantum gravity.
