de Sitter的马尔可夫动力学
Markovian Dynamics in de Sitter
摘要：
在dS观测器的因果楔形中，场的平衡态是热的，尽管现实的观测器只能部分地进入该状态。对他们来说，光标量场的非平衡态似乎以马尔可夫方式热化。我们表明这一点，制定了一个系统的扩展跟踪的环境。作为例子，我们计算了$λϕ^4$理论弛豫指数对Starobinsky和Yokoyama结果的$O(λ)$修正.
英文摘要：
The equilibrium state of fields in the causal wedge of a dS observer is thermal, though realistic observers have only partial access to the state. To them, out-of-equilibrium states of a light scalar field appear to thermalize in a Markovian fashion. We show this by formulating a systematic expansion for tracing out the environment. As an example, we calculate the $O(λ)$ correction to the result of Starobinsky and Yokoyama for the relaxation exponents of $λϕ^4$ theory.
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