Quantum fluctuating CGHS geometries and the information paradox
Quantum fluctuating CGHS geometries and the information paradox
复制标题
量子涨落 CGHS 几何结构和信息悖论
DOI：
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发表时间：
2018
影响因子：
3.5
通讯作者：
Aureliano Skirzewski
中科院分区：
文献类型：
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作者：
R. Eyheralde;R. Gambini;Aureliano Skirzewski
我们研究 Callan-Giddings-Harvey-Strominger (CGHS) 提出的二维理论中量子输入空壳层产生的量子时空上的霍金辐射。量子时空是经典几何的叠加，塌缩壳的位置和动量具有不确定性。计算霍金辐射谱，揭示有限时间内的非热行为以及对壳物理自由度的依赖性。当我们达到 i+ 时，霍金辐射对塌缩壳的依赖性在后期近似中变得无关紧要，因为辐射的温度完全取决于宇宙学常数。然而，我们认为，如果我们在考虑逆反应效应的情况下进行测量，则可以从霍金辐射中读取坍缩壳的量子态信息。
We study Hawking radiation on the quantum spacetime generated by a quantum ingoing null shell in the 2d theory proposed by Callan–Giddings–Harvey–Strominger (CGHS). The quantum spacetime is a superposition of classical geometries with uncertainty in position and momentum of the collapsing shell. The Hawking radiation spectrum is computed, revealing a non-thermal behaviour for finite time as well as a dependence on the shell’s physical degrees of freedom. Hawking radiation’s dependence on the collapsing shell becomes irrelevant in the late time approximation as we reach i+ since the radiation’s temperature depends exclusively on the cosmological constant. However, we argue that the information of the quantum state of a collapsing shell can be read from the Hawking radiation if we perform measurements at taking into account backreaction effects.