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

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

Dec 2007

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2007chphy..16.3560w&link_type=abstract

Chinese Physics, Volume 16, Issue 12, pp. 3560-3565 (2007).

Physics

Scientific paper

By introducing the double complex scalar field, this paper constructs the double Lagrangian with the potential V(Φ(J), Φ*(J)) = V(|Φ(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 Noëther 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.

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