标题： Kaluza-Klein 降低二次曲率模型 显示英文标题

标题： Kaluza-Klein Reduction of a Quadratic Curvature Model

摘要： 通过在五维二次曲率引力模型上实现Palatini变分原理，得到两组方程，这些方程可以解释为场方程和应力-能量张量。通过Kaluza-Klein维度约化机制，实现了引力与电磁场和标量稀释场的统一。得到了四维时空中的约化曲率不变量、场方程和应力-能量张量。详细展示了组成场之间相互作用的结构。表明洛伦兹力自然地从约化场方程中出现，标准Kaluza-Klein理论的方程被证明内在地包含在这个模型中。 显示英文摘要

摘要： Palatini variational principle is implemented on a five dimensional quadratic curvature gravity model, rendering two sets of equations which can be interpreted as the field equations and the stress-energy tensor. Unification of gravity with electromagnetism and the scalar dilaton field is achieved through the Kaluza-Klein dimensional reduction mechanism. The reduced curvature invariant, field equations and the stress-energy tensor in four dimensional spacetime are obtained. The structure of the interactions among the constituent fields is exhibited in detail. It is shown that the Lorentz force naturally emerges from the reduced field equations and the equations of the standard Kaluza-Klein theory is demonstrated to be intrinsically contained in this model.