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arXiv 1705.04877gr-qcphysics.flu-dyn
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二次曲率项与变形Schwarzschild-de Sitter黑洞的实验室模拟

Quadratic curvature terms and deformed Schwarzschild-de Sitter black hole analogues in the laboratory

Roldao da Rocha, R. F. Sobreiro, A. A. Tomaz

摘要:

德拉瓦尔喷嘴中流体流上的声波对应于黑洞发射的准正规模式,这些模式是具有宇宙学常数的二次曲率引力的物理解。在跨音速制度在实验室的声波模式在这里提供实验数据的广义引力理论,包括精确的de Sitter的解决方案和周围的Schwarzschild-de Sitter标准解决方案的微扰解决方案。利用经典的测试广义相对论的约束自由参数在这些解决方案中,声扰动的流体流动的喷嘴被认为是研究这些黑洞解决方案的准正规模式,提供偏差的de Laval喷嘴横截面积相比,Schwarzschild解决方案。对于流体中的声波,喷嘴中的流体声波点实现了对应于准正规模式的声学事件视界。

英文摘要:

Sound waves on a fluid stream, in a de Laval nozzle, are shown to correspond to quasinormal modes emitted by black holes that are physical solutions in a quadratic curvature gravity with cosmological constant. Sound waves patterns in transsonic regimes at a laboratory are employed here to provide experimental data regarding generalized theories of gravity, comprised by the exact de Sitter-like solution and a perturbative solution around the Schwarzschild-de Sitter standard solution. Using the classical tests of General Relativity to bound free parameters in these solutions, acoustic perturbations on fluid flows in nozzles are then regarded to study quasinormal modes of these black holes solutions, providing deviations of the de Laval nozzle cross-sectional area, when compared to the Schwarzschild solution. The fluid sonic point in the nozzle, for sound waves in the fluid, implements the acoustic event horizon corresponding to quasinormal modes.

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