扩展背景中的2 PI模拟:无论如何都要做!
2PI simulations in expanding backgrounds: Doing it anyway!
摘要:
我提出了弗里德曼-罗伯逊-沃克宇宙中量子场的2 PI形式。我展示了如何可以解决自洽的量子场的演化和宇宙尺度因子的演化,使用重整化半经典弗里德曼方程。在截断为O(λ ^[2])的2 PI偶联展开式中,我进行了示例计算,证明了在这种情况下的动力学和化学平衡。
英文摘要:
I set out the 2PI formalism for quantum fields in a Friedmann-Robertson-Walker Universe. I show how one can solve self-consistently for the quantum field evolution and the evolution of the cosmological scale factor, using a renormalised semi-classical Friedmann equation. In a 2PI coupling expansion truncated at O(lambda^2), I perform sample calculations demonstrating kinetic and chemical equilibration in this context.
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