New solutions with accelerated expansion in string theory

作者：Dodelson Matthew^*; Dong Xi; Silverstein Eva; Torroba Gonzalo

来源：The Journal of High Energy Physics, 2014, 2014(12): 050.

DOI：10.1007/JHEP12(2014)050

• Flux compactifications
• Superstring Vacua
• dS vacua in string theory

We present concrete solutions with accelerated expansion in string theory, requiring a small, tractable list of stress energy sources. We explain how this construction (and others in progress) evades previous no go theorems for simple accelerating solutions. Our solutions respect an approximate scaling symmetry and realize discrete sequences of values for the equation of state, including one with an accumulation point at w = -1 and another accumulating near w = -1/3 from below. In another class of models, a density of defects generates scaling solutions with accelerated expansion. We briefly discuss potential applications to dark energy phenomenology, and to holography for cosmology.

• 出版日期2014-12-4