标题： 用体粘滞倾斜原始功率谱 显示英文标题

标题： Tilting the Primordial Power Spectrum with Bulk Viscosity

摘要： 在冷暗物质模型的背景下，当前观测表明，产生倾斜原始功率谱且引力波可忽略的暴胀模型是解释大尺度团聚最有希望的机制。 产生这种谱的一般暴胀势的形式是一个双曲函数，并被物理地解释为完美重子流体的能量动量中的整体粘滞应力贡献。 这等价于将状态方程展开为截断的泰勒级数。 讨论了导致这种势的粒子物理模型。 显示英文摘要

摘要： Within the context of the cold dark matter model, current observations suggest that inflationary models which generate a tilted primordial power spectrum with negligible gravitational waves provide the most promising mechanism for explaining large scale clustering. The general form of the inflationary potential which produces such a spectrum is a hyperbolic function and is interpreted physically as a bulk viscous stress contribution to the energy-momentum of a perfect baryotropic fluid. This is equivalent to expanding the equation of state as a truncated Taylor series. Particle physics models which lead to such a potential are discussed.