The behaviour of the quantum stress tensor for the scalar field on the classical background of a spherical dust collapse is studied. In previous works a diverging flux of quantum radiation was predicted. We use the exact expressions in a two-dimensional model formulated by Barve et al (1998 Phys. Rev. D 58 104018). Our present results show that the backreaction does not become important during the semiclassical phase. The appearance of the naked singularity would not be affected by this quantum field radiation. To predict whether or not explosion of the naked singularity occurs, we need a theory of quantum gravity. We depict the generation of a diverging flux inside the collapsing star. The quantum energy is gathered around the centre positively. This would be converted into a diverging flux along the Cauchy horizon. The ingoing negative flux crosses the Cauchy horizon. The intensity of it is divergent only at the central naked singularity. This diverging negative ingoing flux is balanced with the outgoing positive diverging flux which propagates along the Cauchy horizon. After replacement of the naked singularity by a practical high-density region, the instantaneous diverging radiation would change to a milder one with finite duration. [References: 25]
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机译：研究了球形尘埃坍塌的经典背景下标量场的量子应力张量的行为。在以前的工作中，预测了量子辐射的发散通量。我们在Barve等人（1998 Phys。Rev. D 58 104018）制定的二维模型中使用精确的表达式。我们目前的结果表明，在半经典阶段，后反应并不重要。裸奇异点的出现将不受此量子场辐射的影响。要预测是否发生裸奇点爆炸，我们需要量子引力理论。我们描述了坍缩恒星内部发散通量的产生。量子能积极地围绕中心聚集。这将转换为沿柯西地平线的发散通量。传入的负通量穿过柯西地平线。它的强度仅在中央裸奇点处发散。这种发散的负向通量与沿着柯西地平线传播的输出的正发散通量平衡。在用实际的高密度区域代替裸奇点之后，瞬时发散辐射将变为有限持续时间的温和辐射。 [参考：25]
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