Phantom divide crossing with general non-minimal kinetic coupling

作者：Banijamali A^*; Fazlpour B

来源：General Relativity and Gravitation, 2012, 44(8): 2051-2061.

DOI：10.1007/s10714-012-1379-7

• Crossing of phantom divide
• Non-minimal derivative coupling
• Tachyon field

We propose a model of dark energy consists of a single scalar field with a general non-minimal kinetic couplings to itself and to the curvature. We study the cosmological dynamics of the equation of state in this setup. The coupling terms have the form and where xi (1) and xi (2) are coupling parameters and their dimensions depend on the type of function . We obtain the conditions required for phantom divide crossing and show numerically that a cosmological model with general non-minimal derivative coupling to the scalar and Ricci curvatures can realize such a crossing.

• 出版日期2012-8