标题： 二维量子dilaton引力与能量的正性 显示英文标题

标题： Two Dimensional Quantum Dilaton Gravity and the Positivity of Energy

摘要： 利用Regge和Teitelboim的论证方法，得到了二维量子演生引力的ADM质量表达式。通过计算这一表达式，我们证明了只要不存在临界边界，那些可以写成类似Liouville理论的量子理论的能量具有下限。这一事实随后与之前观察到的霍金辐射似乎不会停止的现象相协调。由此得出的物理图景是黑洞处于量子辐射的浴池之中。我们还计算了具有RST边界条件的模型的ADM质量，发现允许负值。这些模型的Bondi质量在大迟滞时间时趋于零，但在中间时间变为负值，这与RST的“雷声爆”现象一致。 显示英文摘要

摘要： Using an argument due to Regge and Teitelboim, an expression for the ADM mass of 2d quantum dilaton gravity is obtained. By evaluating this expression we establish that the quantum theories which can be written as a Liouville-like theory, have a lower bound to energy, provided there is no critical boundary. This fact is then reconciled with the observation made earlier that the Hawking radiation does not appear to stop. The physical picture that emerges is that of a black hole in a bath of quantum radiation. We also evaluate the ADM mass for the models with RST boundary conditions and find that negative values are allowed. The Bondi mass of these models goes to zero for large retarded times, but becomes negative at intermediate times in a manner that is consistent with the thunderpop of RST.