论文标题
量子场实时动力学的平等方法
Equal-time approach to real-time dynamics of quantum fields
论文作者
论文摘要
我们采用量子场理论的相等时间表述来得出有效的动力学理论，首先是针对弱耦合的非相关的bose气体，然后是针对自我相互作用的N分量领域的强相关系统。我们的结果提供了参考文献中采用的量子模拟器平台对均等有效动作的最新测量结果之间的联系。 [1，2]，以及有效动力学或流体动力学描述的基础可观察物。可以以这种方式制定和认证新的非扰动近似方案，在这种方式中，同等有效作用的先验时间分离公式比常规的闭合时间路径方法具有至关重要的优势，而传统的闭合时间路径方法是非局部时间的。
We employ the equal-time formulation of quantum field theory to derive effective kinetic theories, first for a weakly coupled non-relativistic Bose gas, and then for a strongly correlated system of self-interacting N-component fields. Our results provide the link between state-of-the-art measurements of equal-time effective actions using quantum simulator platforms, as employed in Refs. [1, 2], and observables underlying effective kinetic or hydrodynamic descriptions. New non-perturbative approximation schemes can be developed and certified this way, where the a priori time-local formulation of the equal-time effective action has crucial advantages over the conventional closed-time-path approach which is non-local in time.
