LETTER TO THE EDITOR: The coherence of primordial fluctuations produced during inflation
LETTER TO THE EDITOR: The coherence of primordial fluctuations produced during inflation
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致编辑的信：通货膨胀期间产生的原始波动的连贯性
DOI：
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发表时间：
1998
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;J. Lesgourgues;D. Polarski;A. Starobinsky
膨胀过程中产生的量子度规微扰的行为在第二次哈勃半径穿越后的阶段被考虑。结果表明，在量子到经典的有效跃迁过程中，微扰模的振幅和动量之间的经典关联保持了足够长的时间，并且我们用Wigner函数给出了它的显式形式。我们进一步用一个简单的衍射实验证明，量子干涉本质上是被抑制的，量子干涉是无法用经典的随机微扰描述来表示的。扰动的重新散射导致这种关联的相对缓慢的衰变，并导致系统的完全随机化。
The behaviour of quantum metric perturbations produced during inflation is considered at the stage after the second Hubble radius crossing. It is shown that the classical correlation between amplitude and momentum of a perturbation mode, previously shown to emerge in the course of an effective quantum-to-classical transition, is maintained for a sufficiently long time, and we present the explicit form it takes using the Wigner function. We further show with a simple diffraction experiment that quantum interference, non-expressible in terms of a classical stochastic description of the perturbations, is essentially suppressed. Rescattering of the perturbations leads to a comparatively slow decay of this correlation and to a complete stochastization of the system.