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arXiv 0802.0658gr-qc
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随机引力:理论与应用

Stochastic Gravity: Theory and Applications

B. L. Hu, E. Verdaguer

摘要:

半经典引力是基于半经典爱因斯坦方程,其源由量子场的应力-能量张量的期望值给出,而随机半经典引力是基于爱因斯坦-朗之万方程,由于噪声核而具有额外的源。在第一部分中,我们通过两种方法描述了这个新理论的基本原理:公理和功能。在第二部分中,我们描述了随机引力理论的三个应用。首先,我们考虑Minkowski时空中的度规扰动,计算了这些扰动的两点关联函数,证明了Minkowski时空是半经典引力的稳定解。第二,我们从随机引力的观点讨论结构的形成。第三,讨论了黑洞引力背景下霍金辐射的反反应,描述了蒸发黑洞事件视界附近的度规涨落

英文摘要:

Whereas semiclassical gravity is based on the semiclassical Einstein equation with sources given by the expectation value of the stress-energy tensor of quantum fields, stochastic semiclassical gravity is based on the Einstein-Langevin equation, which has in addition sources due to the noise kernel. In the first part, we describe the fundamentals of this new theory via two approaches: the axiomatic and the functional. In the second part, we describe three applications of stochastic gravity theory. First, we consider metric perturbations in a Minkowski spacetime, compute the two-point correlation functions of these perturbations and prove that Minkowski spacetime is a stable solution of semiclassical gravity. Second, we discuss structure formation from the stochastic gravity viewpoint. Third, we discuss the backreaction of Hawking radiation in the gravitational background of a black hole and describe the metric fluctuations near the event horizon of an evaporating black hole

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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