摘要:本文提出一个全新的基础物理理论——双弦理论。该理论假设宇宙由两种互为对偶的基本一维实体构成:携带正能量的能量弦(构成物质与辐射的载体)与携带负能量的时空弦(构成时空几何背景的物理基质)。其核心第一性原理是:在任意时空点的任何时刻,两种弦的能量密度之和严格为零(点零能量原理)。基于此,我们引入“同频化驱动”的宇宙动力学:时空弦网格的整体频率随宇宙演化而变化,并驱动内嵌的能量弦频率同步调整。当能量弦因拓扑约束无法跟上变化时发生 “失协” ,其振动频率固化,由此内禀地产生基本粒子的静止质量。本理论从单一、自洽的几何动力学图像出发,自然地统一解释了费米子的三代结构与质量层级、四种基本力的几何起源、暗物质与暗能量的本质,并将宇宙膨胀诠释为时空弦网格能标绝热降低的宏观表现。该框架无需引入特设的标量场与自由参数,为理解粒子物理与宇宙学提供了一个根本性的新范式。 Abstract This paper proposes a brand-new foundational physical theory—the Dual-String Theory. The theory postulates that the universe is composed of two mutually dual fundamental one-dimensional entities: energy strings carrying positive energy, which act as the carriers of matter and radiation, and spacetime strings carrying negative energy, which form the physical substrate of the geometric spacetime background. Its core first principle—the Point-Zero Energy Principle—states that the sum of the energy densities of the two types of strings is strictly zero at any point in spacetime and at any moment. Based on this principle, we introduce a cosmic dynamics governed by frequency synchronization driving: the global frequency of the spacetime string grid evolves with the universe and drives the synchronous adjustment of the frequencies of the embedded energy strings. When energy strings fail to keep pace with such changes due to topological constraints, frequency mismatch occurs, and their vibration frequencies become fixed, which intrinsically generates the rest mass of elementary particles. Starting from a single, self-consistent geometric dynamical picture, this theory naturally and unifyingly explains the three-generation structure and mass hierarchy of fermions, the geometric origin of the four fundamental forces, as well as the nature of dark matter and dark energy. It also interprets cosmic expansion as the macroscopic manifestation of the adiabatic reduction in the energy scale of the spacetime string grid. This theoretical framework requires no ad hoc scalar fields or free parameters, thus providing a fundamental new paradigm for understanding particle physics and cosmology.