摘要: It is shown that a large class of higher-order (i.e., non-quadratic) scalar211kinetic terms can, without the help of potential terms, drive an inflationary 211evolution starting from rather generic initial conditions. In many mo... 展开 It is shown that a large class of higher-order (i.e., non-quadratic) scalar211kinetic terms can, without the help of potential terms, drive an inflationary 211evolution starting from rather generic initial conditions. In many models, this 211kinetically driven inflation (or 'k-inflation' for short) rolls slowly from a 211high-curvature initial phase, down to a low-curvature phase and can exit 211inflation to end up being radiation-dominated, in a naturally graceful manner. 211The authors hope that this novel inflation mechanism might be useful in 211suggesting new ways of reconciling the string dilation with inflation. 收起