A possible unification model for all basic forces

A unification model for strong, electromagnetic, weak and gravitational forces is proposed. The tangent space of ordinary coordinate 4-dimensional spacetime is a submanifold of a 14-dimensional internal spacetime spanned by four frame fields. The unification of the standard model with gravity is governed by gauge symmetry in the internal spacetime. Project supported in part by the Outstanding Young Scientist Fund of China.     

The Pattern of Reality

A scheme of symmetry breakage can be imposed on orthogonal directed line elements for the algebra sl(4, C) which, for subalgebras, results in a pattern corresponding to the fundamental particles of the standard model, the graviton, and further elements corresponding to possible fundamental particles for dark matter.     

时间标度与甚早期宇宙疑难问题

注意到绝对时间和绝对温标分别是在牛顿第二定律和卡诺定理引理成立的前提下所确立的时标和温标,则引力理论方程与大统一理论的动力学方程,比如关于电磁学的麦克斯韦方程组,可能实际上也规定了两个不同的时标.大统一理论时标和引力时标之间在宇宙演化历史不同时期的差异也许能为最近的一些宇宙学观测提供合理的解释.文章将表明,如果两者之间存在合适的差异,则视界问题可以得到自然的解决而暗能量概念的引入也变得没有必要.考察距离观察者不同远近的双星体系中由引力行为决定的转动周期和由大统一理论决定的某个衰变动力学过程特征时间,比如来自X射线双星体系的X射线辐射,比照两者在宇宙不同历史时期的差异,或能为我们的猜想提供观测证据.     

Analysis of network traffic flow dynamics based on gravitational field theory

For further research on the gravity mechanism of the routing protocol in complex networks,we introduce the concept of routing awareness depth,which is represented by ρ.On this basis,we define the calculation formula of the gravity of the transmission route for the packet,and propose a routing strategy based on the gravitational field of the node and the routing awareness depth.In order to characterize the efficiency of the method,we introduce an order parameter,η,to measure the throughput of the network by the critical value of phase transition from free flow to congestion,and use the node betweenness centrality,B,to test the transmission efficiency of the network and congestion distribution.We simulate the network transmission performance under different values of the routing awareness depth,ρ.Simulation results show that if the value of the routing awareness depth ρ is too small,then the gravity of the route is composed of the attraction of very few nodes on the route,which cannot improve the capacity of the network effectively.If the value of the routing awareness depth ρ is greater than the network's average distance l,then the capacity of the network may be improved greatly and no longer change with the sustainable increment of routing awareness depth ρ,and the routing strategy performance enters into a constant state.Moreover,whatever the value of the routing awareness depth ρ,our algorithm always effectively balances the distribution of the betweenness centrality and realizes equal distribution of the network load.     

等效原理空间实验检验

等效原理地面实验检验已经达到了10-13,为了进一步提高实验精度,寻找新的相互作用和检验引力理论,人们提出了一系列更高精度等效原理检验的卫星计划.文章主要概述了等效原理空间检验的原理、发展历史和发展现状,并对进一步空间等效原理检验进行了简要展望.     

A novel origin of CP violation

We propose the complex group theoretical Clebsch-Gordan coefficients as a novel origin of CP violation. This is manifest in our model based on SU(5) combined with the double tetrahedral group, T^′. Due to the presence of the doublet representations in T^′, there exist complex CG coefficients, leading to explicit CP violation in the model, while the Yukawa couplings and the vacuum expectation of the scalar fields remain real. The tri-bimaximal neutrino mixing matrix arises from the CG coefficients of T^′. In addition to the prediction for , the model gives rise to a sum rule, , which is a consequence of the Georgi-Jarlskog relations in the charged fermion sector. The leptonic Dirac CP violating phase, δ_?, is predicted to be ∼227^°, which turns out to be the value needed to account for the difference between the experimental best fit value for the solar mixing angle and the TBM prediction. The predicted CP violation measures in the quark sector are also consistent with the current experimental data.