Origin of classical structure in the Universe
Origin of classical structure in the Universe
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宇宙经典结构的起源
DOI：
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发表时间：
2007
期刊：
影响因子：
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通讯作者：
A. Starobinsky
中科院分区：
文献类型：
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作者：
C. Kiefer;I. Lohmar;D. Polarski;A. Starobinsky
我们解决了原始波动的量子到经典的转变，即这些波动的经典随机属性的出现。我们特别讨论了这些涨落的纠缠熵、退相干时间以及它们的经典基础（指针基础）问题。哈勃尺度之外的模式的退相干时间由哈勃参数设置。经典态的场幅值是窄高斯分布。
We address the quantum-to-classical transition for primordial fluctuations, that is, the emergence of classical stochastic properties for these fluctuations. We discuss in particular the entanglement entropy for these fluctuations, the decoherence time, and the question of the classical basis (pointer basis) for them. The decoherence time for modes outside the Hubble scale is set by the Hubble parameter. The classical states are narrow Gaussians in the field amplitude.