The double Lagrangian its applications with U（1, J） symmetry and to the cosmology  

作　　者：吴亚波 吕剑波 贺敬 付明慧 

机构地区：[1]Department of Physics, Liaoning Normal University, Dalian 116029, China

出　　处：《Chinese Physics B》2007年第12期3560-3565,共6页中国物理B（英文版）

基　　金：Project supported by the National Natural Science Foundation of China （Grant No 10475036） and the Scientific Research Foundation of the Higher Education Institute of Liaoning Province under （Grant No 05L215）.

摘　　要：By introducing the double complex scalar field, this paper constructs the double Lagrangian with the potential V（Ф（J）,Ф（J）） = V（│Ф（J）│）, which not only can describe the evolution of quintom Universe, but also can naturally give the spintessence and hessence Universe. Furthermore, the U（1, J） symmetry of the double complex Lagrangian is verified, and the total conserved charge within the physical volume is derived by means of the Norther theorem. Moreover, it can point out that the ＇imaginary motion＇ of the angular parameter in Ref.[14], in fact, is only a real phase displacement in our model.By introducing the double complex scalar field, this paper constructs the double Lagrangian with the potential V（Ф（J）,Ф（J）） = V（│Ф（J）│）, which not only can describe the evolution of quintom Universe, but also can naturally give the spintessence and hessence Universe. Furthermore, the U（1, J） symmetry of the double complex Lagrangian is verified, and the total conserved charge within the physical volume is derived by means of the Norther theorem. Moreover, it can point out that the ＇imaginary motion＇ of the angular parameter in Ref.[14], in fact, is only a real phase displacement in our model.

关 键 词：double Lagrangian density canonical scalar field dark energy 

分 类 号：O41[理学—理论物理]