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arXiv 2209.01713gr-qchep-th
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引力粒子产生中的量子干涉

Quantum interference in gravitational particle production

Edward Basso, Daniel J. H. Chung, Edward W. Kolb, Andrew J. Long

摘要:

先前对暴胀相干振荡期间引力粒子产生的数值研究显示,产生的粒子的谱密度存在无法解释的波动。我们认为,这些功能是由于量子干涉的相干散射反应产生的粒子。我们提供了精确的解析公式来计算粒子生产振幅的共形耦合标量场,包括在运动学区域的生产可以解释为暴胀子散射到标量的最终状态通过引力子交换的干涉效应。

英文摘要:

Previous numerical investigations of gravitational particle production during the coherent oscillation period of inflation displayed unexplained fluctuations in the spectral density of the produced particles. We argue that these features are due to the quantum interference of the coherent scattering reactions that produce the particles. We provide accurate analytic formulae to compute the particle production amplitude for a conformally-coupled scalar field, including the interference effect in the kinematic region where the production can be interpreted as inflaton scattering into scalar final states via graviton exchange.

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