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arXiv 1905.03045gr-qcquant-ph
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模拟黑洞实验中的反反应

Backreaction in an analogue black hole experiment

Sam Patrick, Harry Goodhew, Cisco Gooding, Silke Weinfurtner

摘要:

在广义相对论中,黑洞与其周围的场之间的相互作用(一个被称为逆反应的过程)通过黑洞质量和角动量的演化进行。引力的近似模型,特别是流体力学的类似模型,在模拟场的传播以及它们在黑洞周围所经历的效应方面非常成功。然而,流体动力学黑洞是外部驱动的系统,其有效质量和角动量由实验参数设定,因此预计不会发生显着的内部反反应过程。我们表明,使用旋转排水涡流,有限大小的流体系统表现出的记忆,保持跟踪系统中的散射过程。这种记忆被编码在系统的总质量中,因此,反作用作为背景参数的显著全局变化而出现,而不是小的局部校正。更重要的是,这种逆反应被一个动力学度量所封装,这提高了研究演化中的黑洞时空周围的波背景相互作用的可能性。

英文摘要:

In general relativity, the interaction between a black hole and the fields around it (a process known as backreaction) proceeds via the evolution of the black holes mass and angular momentum. Analogue models of gravity, particularly fluid mechanical analogues, have been very successful in mimicking the propagation of fields, and the effects they experience, around black holes. However, hydrodynamic black holes are externally driven systems whose effective mass and angular momentum are set by experimental parameters, and as such no significant internal backreaction processes are expected to take place. We show, using a rotating draining vortex flow, that a fluid system of finite size exhibits a memory that keeps track of scattering processes in the system. This memory is encoded in the total mass of the system and hence, the backreaction arises as a significant global change in the background parameters, as opposed to a small local correction. More importantly, this backreaction is encapsulated by a dynamical metric, raising the possibility of studying wave-background interaction around evolving black hole spacetimes.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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