标题： 来自暗物质区的内在熵扰动 显示英文标题

标题： Intrinsic Entropy Perturbations from the Dark Sector

摘要： 完美流体通过有效场论方法进行建模，这种方法自然地给出了对压力变化的内在非绝热贡献的自洽且明确的描述。 我们研究了内在熵扰动对暗物质区中曲率扰动${\cal R}$的超视界动力学的影响。 暗物质区由暗物质和暗能量组成，被描述为单一的完美流体。 还研究了非微扰涡度的动力学以及完美流体的Weinberg定理破坏。 显示英文摘要

摘要： Perfect fluids are modeled by using an effective field theory approach which naturally gives a self-consistent and unambiguous description of the intrinsic non-adiabatic contribution to pressure variations. We study the impact of intrinsic entropy perturbation on the superhorizon dynamics of the curvature perturbation ${\cal R}$ in the dark sector. The dark sector, made of dark matter and dark energy is described as a single perfect fluid. The non-perturbative vorticity's dynamics and the Weinberg theorem violation for perfect fluids are also studied.