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Tachyon Cosmology with Gauss–Bonnet and Non-Minimal Kinetic Couplings
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作者 A.Banijamali 《Communications in Theoretical Physics》 SCIE CAS CSCD 2016年第5期645-652,共8页
We consider a tachyonic model of dark energy in which scalar field non-minimally coupled with curvature and kinetic part of its Lagrangian density.Additionally the model contains the Gauss–Bonnet coupling to the scal... We consider a tachyonic model of dark energy in which scalar field non-minimally coupled with curvature and kinetic part of its Lagrangian density.Additionally the model contains the Gauss–Bonnet coupling to the scalar field through an arbitrary function.The non-minimal Gauss–Bonnet coupling function and scalar field potential have been obtained for power-law solution and then for a dynamically varying equation of state.We have extracted the required condition for the so-called phantom divide line crossing in the model and represented such a crossing numerically. 展开更多
关键词 tachyon field Gauss–Bonnet cosmology non-minimal kinetic coupling crossing of phantom divide
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