Imaging topological solitons: The microstructure behind the shadow
Imaging topological solitons: The microstructure behind the shadow
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DOI：
10.1103/physrevd.107.084042
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发表时间：
2022-12
影响因子：
5
通讯作者：
Pierre Heidmann;I. Bah;E. Berti
中科院分区：
文献类型：
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作者：
Pierre Heidmann;I. Bah;E. Berti
我们研究了与史瓦西黑洞具有相同渐近性质的拓扑孤子中的光子测地线。这些是弦理论中的相干态，对应于通过紧致额外维度动力学的时空纯变形。我们比较这些解决方案与史瓦西黑洞通过计算零测地线，推导出李雅普诺夫指数，并成像其几何形状所看到的一个遥远的观察者。我们发现，拓扑孤子的表观尺寸和散射特性非常类似于黑洞，而光滑和水平。入射光子经历非常高的红移，从光子散射的角度来看，诱导现象学的类视界行为。因此，他们提供了一个令人信服的情况下，现实世界的引力孤子和拓扑替代黑洞从弦理论。
We study photon geodesics in topological solitons that have the same asymptotic properties as Schwarzschild black holes. These are coherent states in string theory corresponding to pure deformations of spacetime through the dynamics of compact extra dimensions. We compare these solutions with Schwarzschild black holes by computing null geodesics, deriving Lyapunov exponents, and imaging their geometries as seen by a distant observer. We show that topological solitons are remarkably similar to black holes in apparent size and scattering properties, while being smooth and horizonless. Incoming photons experience very high redshift, inducing phenomenological horizon-like behaviors from the point of view of photon scattering. Thus, they provide a compelling case for real-world gravitational solitons and topological alternatives to black holes from string theory.