A parton picture of de Sitter space during slow-roll inflation
A parton picture of de Sitter space during slow-roll inflation
复制标题
慢滚膨胀期间德西特空间的部分子图
DOI：
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发表时间：
2009
期刊：
影响因子：
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通讯作者：
D. Seery
中科院分区：
文献类型：
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作者：
D. Seery
众所周知，德西特空间中的期望值受到红外散度的影响。很久以前，Starobinsky提出，根据经典运动方程加上随机源项，可以通过演化场的长波部分来适应德西特空间中的红外效应。我认为，当考虑到量子力学环路修正时，德西特空间中超视界演化的独立宇宙图像，在一定的前导对数近似下，与斯塔宾斯基的随机方法是等价的。特别地，一个盒子的德西特空间的时间演化可以用强子内部部分的DGLAP演化来理解，它描述了强子组成部分的分布随它们被探测的能量尺度的缓慢对数演化。
It is well-known that expectation values in de Sitter space are afflicted by infra-red divergences. Long ago, Starobinsky proposed that infra-red effects in de Sitter space could be accommodated by evolving the long-wavelength part of the field according to the classical equations of motion plus a stochastic source term. I argue that — when quantum-mechanical loop corrections are taken into account — the separate universe picture of superhorizon evolution in de Sitter space is equivalent, in a certain leading-logarithm approximation, to Starobinsky's stochastic approach. In particular the time evolution of a box of de Sitter space can be understood in exact analogy with the DGLAP evolution of partons within a hadron, which describes a slow logarithmic evolution in the distribution of the hadron's constituent partons with the energy scale at which they are probed.
影响因子：
8.7
作者：
Komatsu, E.;Smith, K. M.;Wright, E. L.
通讯作者：
Wright, E. L.