arXivDaily arXiv每日学术速递 周一至周五更新
arXiv 0704.3301hep-thastro-phgr-qc
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眺望地平线之外

Looking beyond the horizon

Eugeny Babichev, Viatcheslav Mukhanov, Alexander Vikman

摘要:

在这个简短的演讲中,我们回顾了我们在论文hep-th/0604075中的结果,主要强调了程函近似中的因果性和声学度量问题。此外,我们还修正了我们原来工作中关于声信号红移的公式。证明了如果存在一种特殊的Born-Infeld型标量场,那么人们可以从黑洞内部发送信息.这种信息被编码在非平凡的标量场背景中传播的场的扰动中,作为“新以太”。虽然该理论的作用是明显的洛伦兹不变的非平凡的解决方案自发地打破这种对称性,允许超光速传播的扰动相对于这个“新的以太”。我们找到了描述标量场吸积到黑洞上的背景定态解。检查这个解决方案周围的小扰动的传播,我们表明,在史瓦西视界内发出的信号可以到达位于黑洞外的观察者。因此,吸积场形成了黑洞的流体动力学模拟,其视界在引力黑洞的内部,吸引在标量场中。

英文摘要:

In this short talk we review our results from the paper hep-th/0604075 with the main stress on the issues of causality and acoustic metric in eikonal approximation. In addition we correct the formula for the redshift of sound signals from our original work. We show that, if there exists a special kind of Born-Infeld type scalar field, then one can send information from inside a black hole. This information is encoded in perturbations of the field propagating in non-trivial scalar field backgrounds, which serve as a "new ether". Although the action of the theory is manifestly Lorentz-invariant the non-trivial solutions break this symmetry spontaneously, allowing, the superluminal propagation of perturbations with respect to this "new ether". We found the stationary solution for background, which describes the accretion of the scalar field onto a black hole. Examining the propagation of small perturbations around this solution we show that the signals emitted inside the Schwarzschild horizon can reach an observer located outside the black hole. Thus the accreting field forms a hydrodynamical analog of a black hole whose horizon is inside of the gravitational black hole drawing in the scalar field.

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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