We study the influence of black-hole evaporation on light propagation. The framework employed is based on the non-linear QED effective action at one-loop level. We show that the light-cone condition is modified for low-energy radiation due to black-hole evaporation. We discuss conditions under which the phase velocity of this low-energy radiation is greater than c . We also compute the modified light-deflection angle, which turns out to be significantly different from the standard GR value for black-hole masses in the range M Pl ? M ? 10 19 M Pl .
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机译：我们研究了黑洞蒸发对光传播的影响。所采用的框架基于一环级别的非线性QED有效动作。我们表明，由于黑洞蒸发，光锥条件被修改为低能辐射。我们讨论了这种低能辐射的相速度大于c的条件。我们还计算了修正的光偏转角，结果证明它与黑洞质量在M Pl范围内的标准GR值显着不同。 M？ 10 19 M Pl。
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