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arXiv 2602.06558hep-thgr-qc
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bulk相位移与奇点

Bulk Phase Shift and Singularity

National and Kapodistrian University of Athens(雅典国立卡波蒂斯坦大学);Trinity College, Dublin(都柏林三一学院)

Yueke Jia, Manuela Kulaxizi

AI总结:

该研究通过位置空间相关函数的奇点识别黑洞散射中的时间延迟和角偏转,提出了一种更稳健的双曲CFT解释方法。

摘要:

高能轻粒子在固定碰撞参数下与黑洞的散射由一种eikonal相位描述,该相位编码了由此产生的时间延迟和角偏转。这种bulk相位移可以被解释为CFT中标量算符的热动量空间两点函数在Regge极限下的双曲解释。在小碰撞参数下,相位移获得虚部,表明不弹性散射,使时间延迟和偏转的解释变得复杂。然而,在双曲CFT中,这些量也可以从所谓的bulk-cone奇点中提取出来。将此分析扩展到小碰撞参数,我们发现位置空间相关函数在黑洞奇点的光子测地线反射并到达另一端边界时出现奇点。这提供了通过位置空间相关函数奇点更稳健地识别bulk时间延迟和角偏转的方法。

英文摘要:

High-energy scattering of a light particle off a black hole at fixed impact parameter is described by an eikonal phase, which encodes the resulting time delay and angular deflection. This bulk phase shift admits a holographic interpretation as of the thermal momentum-space two-point function of a scalar operator in the CFT in the Regge limit. At small impact parameter, the phase shift acquires an imaginary part signaling inelastic scattering, obscuring the interpretation of time delay and deflection which become complex-valued. However, in a holographic CFT these quantities can also be extracted from the so called bulk-cone singularities of the position space thermal correlator. Extending this analysis to small impact parameters, we find that the position-space correlator develops a singularity precisely when a null geodesic reflects off the black hole singularity and reaches the opposite boundary. This provides a more robust identification of bulk time delay and angular deflection through singularities of position-space correlators.

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