标题： 一环超弦有效作用量中的守恒宇宙结构 显示英文标题

标题： Conserved cosmological structures in the one-loop superstring effective action

摘要： 超弦理论的一圈量子修正的低能有效作用量的一般形式是众所周知的。 基于此作用量，我们推导了宇宙时空中的完整微扰方程和一般解析解。 利用这些解，我们确定了表征微扰的守恒量：在大尺度极限下，均匀场规范中的引力波振幅和受扰三维空间曲率，以及旋转微扰的角动量，都独立于引力部分的变化而守恒。 提出了基于弦作用量计算暴胀时期产生的微扰谱的含义。 显示英文摘要

摘要： A generic form of low-energy effective action of superstring theories with one-loop quantum correction is well known. Based on this action we derive the complete perturbation equations and general analytic solutions in the cosmological spacetime. Using the solutions we identify conserved quantities characterizing the perturbations: the amplitude of gravitational wave and the perturbed three-space curvature in the uniform-field gauge both in the large-scale limit, and the angular-momentum of rotational perturbation are conserved independently of changing gravity sector. Implications for calculating perturbation spectra generated in the inflation era based on the string action are presented.